ok you have the same problem I had with a warrior / healer, ask yourself this, what can healer do on his own if your on his dps all the time?.. meaning nuke the warrior this will take ages yes but you got a trump card, mana burn and innervate, if your priest goes low cyclone the warrior be the biggest irritation ever.
for the warlock/druid try to go onto the warlock pull them in a close area so the druid cant run very far. once again its all about outhealing the warlocks damage, he can only fear so much, you got fearward+ trinket + barskin after all if the druid is inervating himself make sure it gets despelled , Dont let him drink keep fiery fire, swp on him at all times dont let him go stealth and this should be a kill, a good geared warlock is hard to outheal / dodge fears though :S
for the 1st one I also have a problem