I kill resto druids all day as combat with healer. I see more and more starting the fight out of stealth to cast HoTs and shit, beeline straight for them, dodging obvious shit on ground / trying to predict where warrior will leap / DK will drop his puke zone, hunter flare etc. Open with CS > RvS > Glyph'd Garrote, get SnD up, drop a KS with Internal Bleeding for pressure, then wait for first displacer beast to burn AR and CloS (roots), then quickly get up to redbuff and KS > Spree > M4D > DfA him, hopefully while he is in caster form. Not going for kill here, just trying to force trinket and/or tree if he specced it. Ohce he trinkets, have your pardner CC him (cyclone works great) while you swap to the dps for a bit (cancelaura crippling if it's a DK). Once druid is in full DR, hopefully wasting a lot of time in Cyclone if your pardner is a druid, switch back to him, KS every 20 seconds to apply pressure, kick bad shit, maximize uptime during second Deep Insight, you will not have Spree for kill window yet, but make sure to KS him still for the huge Internal Bleeding DoT + potential freakout, ideally get full DR CC on his pardner to see if he will oblige with trinket pop. Rinse, repeat, third Deep Insight should be a kill.
Other shit - your pardner should be peeling for you or being vocal if he needs you to peel for him, use Feint and Evasion as you need, communicate to make sure that he is not CC'd and you are about to die. Kick Cyclones and big heals. Burn Blind early, can even use on druid to stop a big heal if you slightly out of range and step / kick down. Also very important to not lose Insight stack due to not refreshing in 15 seconds, very possible if you are being kited. Btw smoke bomb can help you not get peeled during kill burst, or you can burn early on after catching DPS in stun in order to try to freak ppl out.
Btw, and if you are playing as rogue healer vs survival restodruid, and your healer is not a druid, you are probably not going to be able to win by going mongo on the druid, will likely need to swap between targets, purge HoTs, etc, LoS the hunter and play defensively outside of burst windows. Someone else may be able to help you there, I feel pretty strong vs this comp with my druid tho.
Oh, and if you are playing Subt in 2s, you are not going to get far unless you are absolutely gosu, or are playing a viable 2dps comp, at which point I cannot help you.
Btw, got absolutely rekt by a Subt rogue + Spriest yesterday, was proud of the little feller.