Ying is limited to 2 stationary Illusions. If Ying wants to push up she needs to sacrifice illusions to make new ones to heal or her team will need to fall back for healing. Killing her or her Illusions gives no healing for the enemies to retreat to.
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.
Talus is a champion with high burst damage and excels in a 1v1 against any unsuspecting enemy backlines. However he is vulnerable to any types of CC whether it is stuns, slows or cripples. If you are hit by these, then you're in deep trouble.
"Smoke screen" blocks line of sight of Turrets, so they can't shoot anyone. You can mitigate Barik’s damage for 5 sec, just with one skill. Right timing and "smoke" placement is key factors.