FoI is not that powerful but lots of fun. With Voidsoul you will primarily focus on chaos not vitality. And the better choice would be demolitionist (for resistance reduction) or oathkeeper (for Aegis of Menhir). Necromancer has nothing to offer for chaos. Here’s my paladin from last patch [1.1.4.1] Devoid Of Soul, In Need Of Buff - Voidsoul FoI/Aegis Paladin (c+) (sr+) might give you a few pointers.