if you want a 100% winrate do a comp with mage mc, celeste, adrian and sam, adrian is for the +20 hp every battle, celeste for the party skill +12 dmg to 12 dice and the passive every 5 attack dice roll a d12, the mage mc for +1 mana regen and sam for the attack, she grants 4d shield, 4d attack and the passive gives 4d heal, in the endgame you will have 300hp and +96 for a d12, all without buffs, if you are lucky enough you can oneshot the dragon and the fallen angel, but it always end in less than 3 turns (srry for the typos, english is not my first language)