Lian does very good damage and if you are in a situation where the Lian is targeting you next, try to make note on what abilities Lian has on cooldown so you can quickly snipe her down.
if you encounter a pip 1v1 go back to your team as pips can be sneaky as hell and its most likely you wont be able to kill him given his heals and jumps, but if you wanna kill him buy cauterize and mark him the moment you see him
Your shield shields damage from behind and in front of the shield. Given your higher mobility, use it to your advantage to confuse Ruckus. Rocket boots is also useful.
Again if she tries to escape his death with smoke bomb if you chose deja vu, you can use setback in area and send her forward away from the smoke, and with less health ready to be killed.