The mana curve doesn't seem to move that nicely if you ask me man, for me the main strength of reanimators is being able to mana-ramp and dredge efficiently enough for it to feel like you are cheating big gnarly creatures into play. For example, once you get out a Gilded Lotus, you are only one land drop from hardcasting Massacre Wurm, your most common creature in the deck. If this were my deck I would be looking to add cards that mana-ramp super efficiently at the extra "cost" of discarding cards from your hand. The inclusion of exhume is fantastic though, and is a smart card for holding back lots of aggro decks. I can't think of precise cards to direct you to that are in black and green that mana-ramp / discard though. Honestly I am a pretty new player so I might be talking gibberish.

@GnarkillAU. Good to know. I'll keep my eye out for such cards. Didn't think about that. I updated my deck quite a bit since 12 hours ago, so you might want to look at my changes. (the deck's Mana Curve has changed drastically as well)