After doing some light reading on SP.net, it looks like Touch of the Grave is the strongest PvE racial available now.
(333 MAEP for TotG, vs. 300 for Panda Epicurean, and 100-200 for other racials)
Is the proc really as strong as SP makes it out to be? I don't have the chance to test it out for myself, but I'm almost regretting changing my Undead to a Goblin back in Cata. :P