Rogue and cleric tanks have *roughly* the same HP
Rogue takes 1000 damage over 10 seconds (after all mitigation is said and done)
Cleric takes 1250 damage over 10 seconds and self-heals for 250
Which one has the greater survival?
I find it interesting how the size of your group keeps getting smaller and smaller. "Can" a cleric self-heal their way through a T1 expert? yes, if they are in HK or better gear and use an edgecase spec that is good for nothing else. But in that level of gear, so can a rogue tank with rift scavenger and adds. Heck I would bet that a warrior with paly and reaver heals could likely survive a T1 expert boss as well when they are rocking HK relics/ID gear too.