Priest Bubble is the worst to come up against though as a Rogue. Take for example a Discipline Priest with, say... 1,600 health. now add the 900 absorb. Total of 2,500 health, yes? Plus! Most twinks will have Arena Grand Master - another 750 - 1,250 damage absorbed (let us use the 1,000 mark absorb for this example). This totals at 3,500 health to get through within a couple of seconds - if wishing to burst. My average, self-buffed - on PvP target burst is about 300 dps. Cutting down to 150-ish after 5 seconds. Meaning - on average, I would have gotten them down 1,500 health - without bubble, they would nearly be dead as is. However, that would be a rare sight! Meaning they would be at 1,000 health and no doubt able to refresh their bubble (another 900 absorbing) - however, if I got through their bubble they would no doubt pop their Arena Grand Master absorbing (roughly another 1,000).
So looking at the amount a fully BiS Discipline Priest can heal and then also deal! You'll have trouble defeating one. This is without any CC's.