One minor thing to point out even though it probably shouldn't occur considering how miniscule it is but;
Benediction alone is not enough because it doesn't heal 100% of a DRK's HP while under walking dead.
So for example, a DRK has a total of 15,000 HP and hits the walking dead status with 1hp left(health cannot go lower). Benediction will only cure 14,999 by itself making it 1 short from removing the walking dead debuff. Naturally more often than not this teeny tiny amount will be covered by HoTs and/or DRK's self heal (if he is in Grit using SE or bloodbath) but for those WHMs out there that leave the DRK with no heals save for a last second benediction be warned.
Hello, my name is idiot.