I have a lvl 50 Elhain that fights in faction wars only - but a lvl 50 damage dealer can't do the job right. My fights in stage 21 take forever - thank god they made supder raids in faction crypts.

I'm thinking about to make a high elves champ lvl 60 as damage dealer, and after building Elhain to 50 I got Yannica (from clan shop, sits in the vault with lvl 1) and Basileus Roanas (just pulled yesterday). I think they are a better investment than Elhain anyway.

So there are two questions:

1. Is there any reason to keep Elhain geared on standby, maybe a strange secret room like "use only lvl 50 magic affinity attack champs from High Elves faction"? There are rooms like "only epic Lizardmen"  (who had this stupid idea? 🔥), so I don't want to make a mistake and pay a million to unequip her just to put on the gear a few weeks later. 
2. Who should join the team, Basileus Roanas or Yannica? Other team members: Lyssandra, Arbiter, Aleks, Royal Guard.