MTG Salvation

I buyed the Innistrad Undead Unleashed precon and I want some advice for which card i can remove and/or add.

I don't like for example Eater of Hope orSpark Reaper or isn't better Grave Pact isntead of Butcher of Malakir ?

P.s.: i don't quite understand the card Dark Salvation, is a creature of the player that create token that get -1/-1? Ty