I think the better solution is leave the dps ate the mobs they aggroed and continue to hold aggro on your marked 1 mob, switching to 2 after 1 dies. If 2 can't get aggro back because dps does not stops dps, well, leave him have fun with the mob and don't waste your TP for him.

Healer that get aggro, is different, if he gets aggro because its job, help him. If he gets aggro because he will cure2 you when you just had 1 hp off, well, it is same as the dps. If they done that on mistake, next mobs they will be more careful, if instead is a continue pull of mobs, it means they doing that on purpose, or because their armor ilvl is 200 but them understanding of aggro mechanics is ilvl 0. But cases, you safe to ignore them at all and make your job.