Been wondering about this myself. Been playing the game since launch but I had a kiddo a few months ago and I"m just now getting back to the point where I think I could do some FPs again. I'm a Guardian tank and don't have a lot of experience with the endgame FPs, though. Before the kiddo I ran the dailies to get purple mods for my orange gear and I think all my stuff is at least 126 rated (I'm at work so I can't check). Just nervous about trying to group finder some FPs (even on easy mode) since the tank is usually the leader.
Simple solution, queue as DPS for a while. Yes the queues are longer but you can watch and learn. Just be sure to leave your taunts out of your rotation
. I did it in WOW and this game.