Raves is a great way to give reach to WB creature strategies. The only struggle I'm having is him versus:
Athreos, God of Passage is unconscionably bad, though. Punisher mechanics like these never pan out - I tried him for a while and cut him after he repeatedly did nothing. He'd be killer as a -aligned, or -aligned card, where turning battle biscuits into spicy meatballs to the face is a likely prospect, but is often home to lots of tokens and recursive tools - neither of which your opponent really cares to pay 3 life to send to your graveyard, since you're either not getting it back (re: tokens), or you're gonna get it back anyway (re: Gravecrawler/Bloodsoaked Champion, etc). It's never a creature, either. Altogether, a dreadfully dull card in cube in my experience, but others may have had better experiences than me..
Ravos, Soultender offers a 2/2 body (hi Reveillark/Alesha, Who Smiles at Death/Recruiter of the Guard) that draws from the graveyard, which is way better than maybe drawing from the board. It's no contest, really.