I suggest that:

• 2 factions should be open for 3 days
• 2 new factions open everyday. 

• 2 factions (just opened) and have 3 days left, 
• 2 factions have 2 days left and 
• 2 factions have 1 day left. 

Energy refills daily or can be obtained through daily activity or drops.

I have to agree with others that the boss is way too hard to beat. 

The time they are open is fine. The real problems are the difficulty and lack of space to store champions.

The difficulty scales too quickly and we need a better way to get the champions in and out of the vaults for each crypt. 

Faction wars have some strengths and some things that are a bit less my cup: 

What I like:

I love that the keys only get spent if you lose, I love that they are free. 

1) A mid game player like me just can't get excited about since I can't even beat the first boss I think he is way too hard, also what's the point in not selling keys? 

2) The amount of resources to spend so you can play against each different faction is way too big, just think about the all the artifact removals necesseray and searches ( Not to even mention how messy the artifact vault is making it even more wasteful.) 

3) I would love it if there were at least 4 factions open at each time for a few days. 4 because that's how many I feel no matter what a mid game player like me could find a way to work on one and plan ahead, when a week passes I already forgot any strategy I might had

Thanks for listening to our concerns, that means more than anything :D good luck ! 

Missed Opportunity:

Raid has a big issue that faction wars had the ability to completely fix: most of the champions are completely unused, some of the champions are used until you find a better one, and a very small number are "end game" champions.  By requiring you to build a team within each faction, Faction Wars had the opportunity to vastly increase the number of useful champions.  Unfortunately, the way that the difficulty scaling works makes it so that you need the same end-game champions fully kitted out just to make it half way through faction wars.

There are other problems, like the way that you vastly increase he number of champions and gear needed without giving us the ability to manage them, but the biggest and most fundamental one, is difficulty scaling.  If you don't believe me gather the following data: find players that complete their daily rewards every every, spend some money but not a huge amount,  and have been playing for at least 6 months.  Look at the average Faction crypt they have beaten.  If the median is is past 12 (half way there) then you've built something balanced and shouldn't worry about what I have said.  If it is (as I would guess) substantially below 12 then you need to ask yourself: who is this content for if my super engaged players then who is it for?

I think comments about champion and artifact management are dead on, that is the biggest disincentive to doing faction wars daily.

However, what I really wanted to comment on is people complaining about difficulty scaling. I've been around Raid long enough to see that things are released in stages and not everything that is released is released complete to the game as currently composed. For example, when the updated progress missions were released they referenced dungeons level 20, before there was a dungeon level 20. The difficulty of Faction Wars tells me that a power creep is coming so I'm not worried about that.

But I think there is a disconnect between the layout of FW and the perceptions of the player base at large. It seems obvious to me, but not to others, that the intent of FW was to make low level runes available to all players, then increasingly powerful runes become available as people progress and develop specialized teams. In my opinion, a great idea! I think though, that this is not apparent to all players, maybe an adjustment to the layout of FW would help. For instance, a layout like campaign, ie. normal 1-7, hard 1-7 and brutal 1-7.

There are a few posts that I agree with, and will kinda second them here.  I am fairly new level 60 account just now getting several maxed out champions.  I haven't gotten past level 7 boss in most cases as it scales difficulty to much for me.  I think the idea of having 'universal ' crypt keys would help a lot.  I also can't afford to test out builds and artifacts really trying to stay free to play.  I might occasionally do a few runs just to get a few 1-star glyphs to upgrade here and there, but I mostly ignoring Faction wars as is for now.

It's quite a pain in the *** to play in FW

How I play in FW

Day ONE

1. You go to FW "Skinwalker" is open, you have no heroes to select (they probably in storage)
2. You go to "Champions" -> Storage
3. Realize you have no F idea who is Skinwalker, in last second you remember one of them, you want to check his skills "Is he decent?"
4. Realize you can not check his skills ????
5. You remove him from the storage
6. Have to search for him again
7. Found him
8. You realize that he is not "Skinwalker"
9. so hard, decide to play Arena instead...

Day TWO

You read some Reddit post, that you can found heroes that you like from fraction in the "Index" and then move them from storage.

That's a good idea! and how I didn't think about it!

1. Go to FW, check the opened FW, it's "Demonspawn"!
2. You think, cool! I have Eva, she has Demon Wings, Demon Horns! Cool
3. Eva is a Dark Elf :(
4. Ok ok, cool, I go to the index, check heroes that I like (done)
5. Now what, should I remember them somehow? draw them, and then search? ok take a screenshot
6. Go to your storage, have no luck finding heroes, switching between "Raid" and the screenshot, And thinking has I fooded them? or what?
7. Ok, you cross out in the screenshot heroes that you don't have and go to the index again
8. Search, repeat until you have at least 5 of them
9. Realize you don't want to play more, as you spent 1 hour just searching for heroes. Will play tomorrow (you think)

Day THREE

Just don't go to FW, not worth it :D. Play campaign, arena, dungeons.

The issue is really just use of keys. Most players are focusing 1-2 factions at a time and not wasting effort on the crypts that very early on crush less developed comps. 

I think a solution may be to have a cumulative key bank for each faction. It could have a cap but it would at least allow players to focus their efforts and not lose resources. 

I think the time open is fine. Attempting FW as a daily isnt difficult. However I do agree with some of the above posts that suggest always having them open. It would allow players to test team changes. The content is difficult enough to where you wouldn't see massive progress and completion. 

I feel like these days its all about money for plarium and only gets worse, you throw new stuff at us constantly when we arent quite ready. All the new champions which several people do not even want but it adds to the pool making it even harder to get the ones we actually do want or need. Some of the events are whacked too, 30k points for champion training? I have done 3 6 star champs to help with faction wars this week alone and thats more than a lot of players can do yet even with 3 im not close to finishing that event.

Faction wars- scales way too difficult, I have legendaries and epics that are maxed out and still cant get passed stage 12 of some factions and then there are some that I cant even get the first boss beat. I like the idea of all factions to be open and you chose which to do with the keys. I also agree the rewards are not worth it, 1-3 star glyphs arent that great, flat stat glyphs for attack, hp and def are not worth it and im getting lots of fails trying to use 3 and 4 star glyphs.

Champion list and vault- we need more space now more than ever, I wasted a lot of rares just to have room in my vault since I was at 200 when faction wars came and 100 max on hand is also not enough since we need to get feeder champs. We need a sort for sure, how about vault champs can march. Make the vault where we can see the champ names, factions etc. Maybe make it where we can assign champs to a team and be able to pull and add at once as a team.

Artifacts-we need more space for these as well, and also a sort system there, its so chaotic and unorganized compared to other games out there.

Fix the upgrade system! it seems like the last update where you tweaked it made it so much worse, my silver is vanishing much quicker now.

Skill upgrades- We need more chances at better tomes and events that are not so difficult to get them, some of these events only a whale can finish. When you have a legendary that needs well over 10 legendary tomes then unless you spend big you cant ever get all your champs maxed....but you guys would rather keep it this way so those whales can keep dropping $200 to max out a champ and with faction wars we need more and more champs....

Dungeons- The drops need reworked, it irritates me to go grind a dungeon and get mystery shards and brews nonstop when I really need gear which also slows down progression for things like faction wars. It seems I get mostly barbarian and dwarf trash that I dont need. Spent around 5k energy this week alone and not seen a single knight revenant ring? Thats some bull right there, as im writing this oh look another barbarian ring just dropped.

Potions- This is another one that has been addressed to you countless times yet you seem to ignore the customers. Stage 15 of a keep should not drop lesser potions nonstop, there should also be no mystery shards or brews here. Add those brews to campaigns. All of this is another hindrance to working on factions.

Crashes- fix your damn game, I get several crashes a day which then steals my energy, my arena tokens, clan boss keys...which means you are stealing my money! This is happening to everyone I talk to and I have good devices so you cant blame that either. I play the game on an Ipad, Note 10+ and sometimes nox/bluestacks and every single devices has crashes daily while other games never do.

I feel like the greed has gotten insane, I have spent a lot, there are some who have spent enormous amounts yet we cant keep up. I touched several things but they all tie in together for faction wars.

As suggested before, take the time table out of it. Limit the amount of keys per week. Maybe win keys with weekly rewards. And allotted keys reset once per week. The stress of placing time frames on everything sucks and leaves no time to do everything. Dailys, Clan stars, and just straight grinding utilises all of the time as it is.

Side note: events and tournaments suck! Make the rewards more attainable and better.