Play drk, it's really easy right now and you get good queues. you have two combos: 123, and spam another one 4 times (5 if you want to get better). Just keep 3000 mp at all time to have tbn just in case, use it with another cd for tankbusters and nothing will happen.
In most fight you don't even have to deal with a lot of mecanics (usally dps and healers get them) just face the boss north or away from the team.
You won't die fast. Again: tbn can save your life.
You can play as a blue dps too if the other tank wants to mt.