If the tank wants to do that, I will gladly come back after dying and let the tank solo dps all the rest of the mobs down.
2 can play that game. I'll throttle my dps all the way down to zero since I was dead anyway. If you don't want to even attempt to tank, you can dps them down.
Don't worry, I'll wait.
In response to the OP, past a certain hp, it's okay to let the dps have it (for most, not all mobs) as they'll generally kill it before it causes any real issues. If you are having issues, mark your priority list of targets so that they can focus. However a lot of experienced DPS should know the 1st and 2nd targets in a pull without having to be marked. Quite a number of them could mark the targets themselves in a similar order that you would mark them. Especially if they have a tanking background.