Ok, I'm stumped...

In order to beat Laeva I need to do at least a bit of damage to her with the 3rd squad, but the second enemy eats up the three first ones and it's already been 3 times when she's left on a sliver eliminating my team. :/
The first enemy gets easily dispatched by an evade squad, but then it goes downhill. Ugh, the challenges in this game...

What were your strategies on beating that stage, especially the second enemy?