I'd go with Rae. All abilities are AOE, the A1 does 60% Dec Def and the A2 hits really hard. A3 also buff-strips all enemies which can be huge for Round 1 and 2 of Dungeons.

Kael and Apothecary would also be good to focus on. Golden Reaper after those 2.

However you're probably gonna be getting more champions soon and you'll get Skeletor for free in the next few days.

Karl. Get that starter built. 

Will farm food for you very well, can take out campaign, only needs rare books to fully rank his skills, is solid in CB teams.

okaya i'll do that, but question, between my epic champion how good is golden reaper? bcs ik skimfos good for debuff-ing enemy and runekeeper has good support too

For long-term use, I would consider Runekeeper Dazdurk to be the best Epic toon you currently have.  Golden Reaper is more of a one-trick-speed-boost pony, while Dazdurk can do that job just as well and offers better support overall.  

Rae is awesoem overall, but it may take a long time to get her fully booked.  

I definitely second the motion to get Kael built out.  He is the best campaign farmer you have, and a quick farmer should be priority #1.   

Oh crap I thought I read Relickeeper not Runekeeper, good call out yeah! Runekeeper for sure

Runekeeper is absolutely the right choice, sorry I read the name wrong when I was going through your champs. 

I pulled Skimfos early on my account and here's the problem, he's only "hypothetically" good. You read the kit and it's like "ooo grab all those debuffs and then place them on the most powerful enemy" but what actually happens is, he takes all the debuffs except the CC ones and then gets killed before he can take his next turn to place all of them. 

The WORST and I mean WORST WORST part of all is his passive because if he steals Heal Reduction from any ally, now his passive does nothing. In fact, it can get him killed if he steals Heal Reduction AND poisons because Poisons stack so he can end up with like 5-6 poisons on him with no healing...

 If he steals Block Buffs from an ally, same thing. His passive doesn't place the Inc Atk or Crit Dmg because it can't.

okay for now my party only has

rae, shaman, mother superior, kael, and skimfos

as for apothecary and runekeeper as sub, whom should i focus first to level up and asc?

Long-term, Dazdurk is an S-Tier Epic, and he is a far superior toon to Apothecary, and frankly, to all of the other toons you have built, except for Rae.   

However, that is long-term.  I am not certain of your short-to-mid-term needs, but oteh toons offer thigns Dazdurkl does not, such as:

Kael: Solid for Clan Boss and is a good campaign farmer.

Apothecary: One of the best Rares in the game, 3-hit A1 can really help with early Fire Knight

I would totally level Dazdurk in place of Mother Superior, Shaman & Skimfos.

For future reference, Soulbond Bowyer is another Rare that you may want to build at some point. She is quite strong in some places.

Good old Karl. Always holding down the fort.