my tactic for using scoot`n`shoot was :
use the LOS tool, placing it on the enemy, and scanning the area around it, to determine what terrain is blocking my LOS to the target.
(assuming the LOS is a bore sighted tool)
this should indicate to you the effects of the terrain (blockages) on your bore sight.
i then just place the scoot section of the command where i guesstimated the divider between the red/black sections of the LOS info.
(i guess you could switch to target mode to measure the distance, then match that distance with the scoot section, but rough is probably good enough)
set the second waypoint back into your covered position (you are in cover arent you?), and bobs your uncle, a sneaky peek.
i noticed this tactic wasnt so hot vs armour on the move, but when you get a chance of a side shot in a slug out, or a nice flank vs a reserve, it seems to work quite well.