linelock and 2 step, one button?

im about to buy the shifter button knob to hook up my linelock and 2 step. Im slightly confused here.
Do I want to stage with line lock on and 2 step in low rpm, then drop both the linelock and 2 step at the same time?

Or have the 2 step on the shifter and linelock on the dash using foot break to stage and linelock for burnout only?

i know we covered this once but i cant seem to find the thread on it.

Car is auto trans 904.

any and all help is appreciated, Thanks and have a great 4th!