I've never sprayed LSR, but:
We've always done in it in drag racing with just 2 or three stages. Perhaps a baby shot for getting the charger to light if the air is thin, then a second shot on window switch+throttle WOT switch+boost switch, then a third stage that is dead man.
The first shot does not operate except to stage, and never again. The second shot is a meager shot that is automatic and dies with the throttle. The third shot is the big-boy.
Since you're not staging, just 2 shots. If your goal is a 100 shot, you have an automatic 30 shot that only comes on at XXXX rpm IF WOT and IF boost is present. Then a 70 shot that has an additional manual switch. It can never come on unless the 30 shot is active.