Wohooo!! I can´t believe I made it through the second battle
I used Gambler (serenity / vorpal), warrior LoL (Trooper / cosmic T3 - Immortality), Cosmic LoL (celestial / cosmic), magus Hierophant (space). I started on first turn and was lucky enough to disable passives in my second turn - with this, things went my way. Gambler stunned and Cosmic LoL made them sleep.
Never got that far by now.... so excited