Ying is able to teleport to her allies during her ult, so when she does try to kill her on sight. She can still have her ult going after she dies, but it can make it harder for the enemy to be healed. Also, remember she can teleport multiple times!
You counter raum with your high sustain and cripple.
Tips:
Keep medium range
If Raum Ășlts:
use obliterate or ult to counter
If he runs you can cripple him w/5stackDS
Teammates inside Smoke Bomb will not appear for Torvald, and his LMB will not target anyone if it is fired until someone appear on torvald's screen, use this trick to escape quickly if you are getting chased or save another teammates