With that explained, I would go with Fighter being a principal class (since it's the Warforged fav' class). You can get potions and recover normally (Until you go Juggernaut later on) and When the Wizard from the celebration get some repair spell, you don't need for getting any level in https://damiengdyrk.suomiblog.com/the-best-side-of-tiefling-warlock-43489736