Honestly I wish the commendation system was more friendly to DPS mains, but more in a way that you don't have to play tank or healer a ton just to meet the commendation requirements everytime they update the mentor requirements unless you just run a crap ton of dungeons.

That is to say it's not that you can't get comms as a dps because I still get them sometimes, just that I feel like the system rewards healer or tank mains disproportionately.

I sometimes tank but for the most part I'm the happiest when I'm sitting in the back dishing out a lot of damage and throwing out mitigation/helping out the healers with raises when needed, honestly.