make sure your priest is dispelling abolish poison. it makes life much harder for the druid. sure, he'll be dispelling lifebloom at the same time, but if you play for an endurance fight and control the warrior your priest can nail the odd mana burn. keep abolish, rejuv and regrowth off the warrior, as well as innervate off the priest, and keep both of you guys topped off (to guard against cyclone cyclying to a degree).
lifebloom blooms will suck, but if you dispel every 3-4s then chances are he'll have stacked it at least once more, and the bloom from 2 or 3 stacks is the same as the bloom from 1. at the right time, cycle MC onto the warrior in order to keep heals off of the war and get the druid to react. this is ideal after the druid burns his trinket, which allows you to blind the druid after MC wears off. then you can work the warrior, controlling and damaging him, while your priest switches the MC to the druid and runs him out of range (druid has to be in caster form; feral forms are immune to MC, but travel is still vulnerable to burn).
its not an easy fight. war/druid and druid/lock are probably the two hardest teams to beat in 2v2. the only teams ive seen with a good chance vs war/druid is mage/war or mage/rogue, and then it becomes a matter of whether or not your mage is good enough to disrupt the druid long enough to kill the warrior.