How do you get past marlena on Psi-Ops

You first spot her in with the fusion reactor,with some gas tanks.First,you may want to dodge the lasers to get use to her.Then,when you've studied her movement a bit,TK some of the gas tanks to the fusion reactor.(not at marlena,you can target it first though)Hint:you can go above the stack of gas tanks and crouch,that way the lasers won't hit you.

Next,she will try to attack you herself,this has just got to bad aiming to serious skills.Now she is a moving target,if you have trouble smacking her,lure her close to the gas tanks at shoot them.

Oh,and just so you know,there's a gnome right before the boss fight.It's in a room on the right,after the elevator.However,there are three shooting gun-thingamajigs guarding the room.Once past them,the gnome is on the top-left corner behind something.