Yeah, up at 59 people generally have the skills/gear/abilities to do more damage, but I still frequently do 50% of the damage as the tank running Strat (trying for my lightforge pants), and often end up self-healing ( I mostly tank as Ret in Champion gear). I've ended up 4-3manning it quite a few times; before I transferred from Bloodlust, I 2manned the whole instance with a 60 fire mage twink I knew.
Pity the poor pugs who end up in Strat because of me though- Strat is a massive biatch. Esp Strat-Undead, and especially as a pally tank. I've figured out how to manage it, but I always try to give the tank a heads up if I end up in there as healer/DPS