As one of Lex's opponents, remember that if you kill Lex he will spawn with you as his target. you will also be at a streak of at least one with will give Lex an incentive to get revenge for more credits.
Skye's Ultimate can be devastating to your team's collective health. But you can be as close to it as you want as long as you break line of sight. If Skye doesn't put the Ult on the Payload, you can you said payload to block ALL Damage from it.
When you see Zhin is an Opponent, Look at his Legendary. If he isn't using Retaliation, Feel free to shoot his counter from a distance as he will only have one block. Never Shoot a Retaliation Zhin though as most Heal from it... A LOT!