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.
Walk through his shield, hook him closer to your teammates. In a 1v1 watch out for his turrets, try to stay out of their fire angles and you will out-dps him then with the help of your shell heal card and extra hooks.
Avoid using soar to get close to Kinessa. If she hears you she will look for you and fully charged can One Shot you. Walk if possible or use blink as it's harder for your location to found by Kinessa than with soar.
Lian can deal massive damage with either lessened or zero need for aim. Her ability to spread damage is massive giving her inflated damage and credit scores, but her DPS is awful. If you are a damage dealer, you'll have to make the tank end her life.