Androxus can deflect Lex's In Pursuit ability, also Androxus shoots faster making him more forgiving for missed shots. Although Lex deals more burst damage. This match up is based on whomever goes first.
Tyra can mark Maeve on her ult making her visible to you and your teammates if you have the legendary card. But keep in mind, Maeve deals huge amounts of damage and is very mobile making her not an easy target.