Yep.
I actually missed a key-point, so I just edited it.
You get the idea. ;-)
If/when you reverse time during flight, basically they cant move or do anything (unless you wanna add reverse-gunfight lol)
when the helicopter reverse-lands at adjacent building helipad, watch them reverse-hop on from helicopter and resume time, you can kill them before they ride on the helicopter and kill the pilot.
so freaking complicated ;-)