You totally should try Warlord, as long you can. It's quite a rush.
I don't really like decaying touch that much. I prefer to keep my heals for healing, there are far better ways to kill enemies of or CC them. Decaying touch only debuffs but nothing more, seems pretty weak. Cooldowns from healing spells aren't that short. And you need to get rid of magic armor first anyway. If the enemie has no magic armor, you can CC it anyway.
