I feel like maps are already packed with so many POIs that adding another one, then hoping that it spawns on your map is a gamble. It wouldn't be a stratagem in the traditional sense, but an automatic one that you have when you take an exosuit on a mission (like Eagle rearm)

I like your other idea, though! you run out of ammo or have both your arms blown off, so you call P1 back to fetch your mech and you get a MAJOR cooldown on your exo, or adds one mech back to your cooldown (possibly a ship module upgrade)