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
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)
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.
Force Torvald to use his Recharge ability in order to maximize the effectiveness of your Energy Shield. Don't pull it out before he uses that ability. It will recharge his shield faster and your shield will be severely crippled.