Lex is a thorn in the foot for Skye as she depends mostly on her stealth and when you track her it's more than easy to take her down with lex's insane damage normally it should only take up to two hits
As Pip can heal the team from afar, you should stay away from the sight of snipers and champions that can fly/float, so staying on top with the help of a good team is really useful.
If you know that youre weapon is going to hit an enemy, use ice block. Becuase there's a chance that you will die before your bullet fire will hit the enemy. (Only use it when you think and know that its going to hit them)
The legendary damage for your attack is a good choice as the frontlines are for most slow moving and thus you can deal insane damage while counter their damage with you illusions (you can also use them to disrupt the beam of torvald)
Currently, Talus' Ultimate is really weak and other than CC immunity, any swift movement can overcome it. Nimble (Literally just 300 credits) can overcome Talus' ultimate.