Elva, Artak and Necmo Thar, Visix....and let your heroes drink potions so they can equip amulets and banners.

Don't waste ressources on champs like Ultimate Galek or Aina. Build some teams for the relevant dungeons. 

A good place to get am impression about what champions can do is Youtube or sites like Ayumilove or Hellhades.

Depends where you want to improve really, you have a ton of good options.  Matrim is right though you should do some potion keeps and get your 6*s fully ascended.

@Ezra Land 

Scyl - can be used everywhere

Wukong - arena or hydra but requires different buid depends what u decide...

Genbo - arena

Artak - good in spider, dt, hydra

Morrigaine

Daihti - good in dt wheres dark fae also part of sylwans 

Elva - shes great everywhere in arena shes brutal

Visix - 

Flashmonger

Whisper - good vs dt dark fae and against fyro

Gorgorab - good for arena

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i suggest focus these, cuz eventually u gonna need them...

With this many worthwhile champions what is going to be critical is being focused. Figure out where you want to improve and focus on those champs. 

+1 to Elva, Artak and Nekmo as well as getting your champs fully ascended. 

I'm stoked I have so many good champs, I haven't paid for anything, I'm sitting on 21k energy and amazing options of champs to level up.

The whole top row is already up to 6*.

You're in a pretty awesome spot, quite the roster. :)

Agreed on the roster. You have some great champions.