Great field to work with, @Goblue333; wish I had your dilemma.
Would help to know two things: What are your priorities/what’s your greatest perceived need in your teams, and who are you using/would you like to use as tank?
You already have perhaps the best sniper - the Big Burrito (Kage) - so it could be better to use Evelyn’s dispell over Lianna as an extra sniper. Zeline would be better for PvP and titans.
For tank, Mits would be better than Marjana (I’m leveling Marj now, but need the sniper). Yes, save the other red for GM!
I don’t have Athena, but if you don’t go with Ev, she’s the best defense debuffer in the game. It would be (is) really tempting to wait to see what Atlantis brings in the next two months - and if you can get one - before deciding; that’s probably what I’d do. Also, v20 is bringing many hero changes (buffs and nerfs), so better to be cautious. Who knows, after Aegir is buffed, you may want him!