Sha Lin needs to see you directly to hit a shot, but you don't. Use the map's corners to shoot him down with AoE damage while protected by the map, no need to waste your shield.
Best thing about Torvald? No movement ability or CC immunity ability, a perfect target for your stuns. By stunning him you can stop him from recharging his shield or using his ult, so he'll have to buy resiliance first instead of cauterize or wrecker
Don't fight Maeve if she doesn't have low health! Position yourself to the high ground on the back so that she'll need to use her movement abilities to get to you. If she does, group up with your tank or teammates and "spam" VBE to get assistance
Once an Andro tries to flank you, you should try to get one or two shots on him, then use your seedlings. He will most likely use reversal which gives you time to escape. This works best if Andro's escape ability is on cooldown (after he has flied)
If Vivian uses her shield, aim for her feet if you’re running direct damage, or the ground below her if you have AoE. This is extremely useful in any range combat with her.