Something most people don't realise is that Ying can do a lot of Damage Output.
Which results in people running right in to kill her and then end up dying.Try to keep distance and kill her clones to decrease escape and healing options, then go in.
Ying's Ultimate ability, Illusory Rift, heals but can let her use her Dimensional Link to teleport to her team. If Ying uses this right after respawning, look out for her teleporting to her team and kill her to waste the Ultimate.