Qyzen has two damaging AoE abilities. I don't remember what they are called, but it is NOT the flare gun; that one is an AoE taunt and does no damage so it should stay on all the time. Of the two damageing AoE attacks, one will default to on, the other off. Turn them both off and make it a habit to check this every time before a pull where you are going to use Lift. Any time he respawns for any reason (zoning in, coming back from selling, you get off the speeder and others) it will revert to their default usage.
Watch for patroling mobs and be careful with your pulls. At 38 it should not be difficult.
[ETA]
Just in case you missed it somewhere ..
Hit ` to toggle your companions full ability bar. It will expand to replace your second hot button bar. Right-click to toggle the different skills on or off. When done, hit ` again to go back to normal button view.