Sacred Guardian is pretty solid, Revived Illusion run was entirely free with an S6 CRK and 33.4% overture no atk pot and only cast fate weaver at the boss room. Lava pools are basically infinite free use of Rend Armor since cooldown resets on hit, so you can spam out damage and prot debuff stacks in sacrafice, lizard witch, and boss room just standing on them and taking 1 damage.