I can say in my recent time trying to level Scholar, there are many places I go into, and it's the same place it's sent me every Duty Roulette, and it's painfully beneath me to heal, so I've just tagged along and let Eos/Selene do the whole thing, largely, because as people have pointed out, I'm just there to get in and out for the XP. Halatali was a good example of this. I was sent there a good 6 or more times back to back while up around level 40, and I was kind of over it.

Similarly, as also pointed out, it's smart to not DPS with a group of strangers. You need to see how quickly they're going to kill things, how fast the tank's health depletes, if he/she is able to hold hate, or if your'e also going to be healing your DPS or yourself. Most the time I'll do an Adloquium on the tank, cast my DOTs, spread them with Bane, and call my job done for DPS and go back to healing the tank.