Spell like abilities do not require any components. They can be dispelled, counterspelled, etc as per regular spells.
I'd suggest that you allow a Vile Servant of Nerull to give those feats as bonus feats to any undead he creates.
Maybe add this at level 9:
Grant bonus feats (Su): At level 9, a Vile Servant of Nerull can grant a number of bonus feats equal to half his Charisma modifier (Minimum 1) to any undead he creates, the undead must meet all prerequisites for the feat at the end of creation. Despite this ability being supernatural, the feats he grants are not, unless the feat explicitly states otherwise.
The feats he can grant are: Baleful Moan, Corrupted Wild Shape, Death Master, Eviscerator, Empowered, Ghostly Grasp, Improved Energy Drain, Spell Drain, Improved Paralysis, Improved Turn Resistance, Lifebond, Lifesense, Positive Energy Resistance, Quicken Manifestation.