I always thought Nito was one of the easiest bosses. Even if you don't put anything in Faith, you can still easily kill his minions with any divine weapon. If you're a magic user or can use bows properly, equip Ring of Fog and Bellowing Dragoncrest Ring. You can even walk right into Nito's cave and the skeletons still won't see you. Cances are, he's getting stuck between the column in the middle and a minion. With both rings equiooed and a projectile weapon at hand, Nito won't last very long.