That is pretty much the idea with healers, especially paladins - get them too blow as many cooldowns as possible right off the bat and make sure they die.
Get Paladins to bubble early. Get druids to use NS and Swiftmend asap, but also make sure to spell lock and CS cyclone. With enough burst, you can blow up a druid before Lifeblooms have enough chance to tick through it. Always always always try to cc the melee (esp. if it's a rogue) asap. Make sure to Curse of Tongues the healer; if it's a druid, auto-devour is a judgement call, but always make sure spell lock is OFF autocast.
Get your mage used to using rank 1 arcane explosion, and use rank 1 rain of fire yourself, to get the rogues out of hiding. Oddly enough, though, I've had the most luck with rogues as Destruction and some lucky Shadowfuries (including one or two that went through cloak of shadows). But it really is a luck-based spec, since your mobility is going to be crap.