Have you tried using https://ayumilove.net/raid-shadow-legends-list-of-offer-packs-guide/ to compare them? Do be aware that not everything is worth the same amount to everyone. Brews are particularly poor value for money.

Either way, I would not buy anything until the last minute, unless a very good offer comes up. You never know if you'll end up snagging another shard from a mission or quest, or from doom tower, or from clan boss, etc.

wait until last moment, there are still 4 UNM and 4 NM chests outstanding.

You mean 1 brutal top chest per day using 4 keys (or 3 for 3rd chest and 1 for lower difficulty 2x chest) :P im under 50 days in , NM and UNM still not there yet ^^

Solved , got sacred daily pack (which gives me enough by sunday reset), also provides extra energy and gem to make the end of this fusion go smoothly . And lets me starts the big hoarding phase with whatever is earned from now on!

During summon rush also pulled a miscreated monster ^^ but no fusion champs or anything else worth mentionning!

And even if i did pull 1-2 void shard from CB or something , wouldnt have been enough since if i follow maths , i needed 680pts and would need to luck out to get enough .

Edit: Had to get that pack now since it gives ressources daily and not all in one go and had the best value to me(energy,gems and shards only)

edit2: yes i use it from time to time , guess i just needed to ask out loud to figure out what my own answer was !

If yoou are under 50 days in you have no hope of completing the fusion anyways without wasting tons of money on energy...

Energy ? You mean the items you can save in your mailbox ? The thing that refills by itself for an avg of 400ish energy daily ? The thing you can buy from bazaar and clan shop ? Then one you can use saved up gems to get ? etc ...

And tons ? +/- 60 $ when i only wanted to spend roughly 50 $ ? 

Also sorry , but not under 50 days , at 52 days now ! And im 3 goats from being done ;)

Edit: 75% done on epic , and 1 goat done , 3 more to go ! Smart hoarding and spending ftw , this fusion was a blast to play through (wont do it again anytime soon , need to hoard way more again before)

I am curious how you manage to get Ice golem, Fire knight, dungeon divers and spider done without spending  a lot of money on energy after 50 days...

Sure thing , i used stage 11 and just about all the stuff i hoarded in mailbox  , also got some from the packs i bought with that 60$ .

I havent done spider yet , not up :P 

But i really did need to spend a little and use up everything to finish them ! 

Update , few more freebies from plarium in mailbox , daily login for 500 energy and my weekly rolled over so 2 more refills , im set to complete it without much hassle , alongside those still in there . 

Have any gems?  One of the best deals in the game is the daily gem pack and if you save up gems, you can buy ancient shard packs from the gem shop in situations like this.  gems are also your best option for getting energy to finish out things like spider.

The 2 sacred deal is trash btw.  When you hit levels 57,67,77,87,97 there is a really good sacred pack, those are the only ones worth getting.