If you're playing against a Strix, your best option is hit 1 fully charged shot before he goes invisible, then remember, Strix is a peeker, he will peek to get his shots while invisible, try to predict when he might peek or where he might be and won
If you are at low health, using commander's grab on terminus is a really bad idea. Because Terminus is a large character, he doesnt go over Khan's head after the throw so he gets a free hit and gets closer to Khan which is what you do not want.
Lex may seem extremely weak against Tyra, but when you have no mobility against a flanker there are plenty of situations where you could be caught off guard. When countering Tyra, Combat Slide (and the Heroism legendary) is the way to go.