If you have the space (Which I understand if you don't), the first thing you should add is either of the two
Likewise, every color has access to graveyard hate in some shape or form, and you should be running at least a little to keep on top of the many ways in which decks use their graveyards
Return the Favor Return the Favor is your 3-mana Redirect that also lets you copy the spell you're targeting for 4 mana, also acting as a pseudo Reverberate
With so many ultra-powerful options, should a 4/4 for top the list
I also like to bring in Shatter against White Weenie, because not only does it kill their Mishras Factories, but it can also deal with City in a Bottle, which many White Weenie variants may rely on against you (and can be devastating if not quickly dealt with)
The attack and sacrifice triggers often are fine at their lowest power level with say a 1/1 token, but the power gets jacked way up when you have cards with more power than their mana value like Anticausal Vestige