You can get a computer controlled unit to use special abilities through various tricks (there's a good comprehensive tutorial on this), but for some spells they seemingly won't do it more than once per game.
In my case what I need is to have all the science vessels you buy blinded. Just moving the vessel when it spawns to a hidden place with a computer medic with enough energy/researched flare will make the medic blind the vessel, then you move the vessel back.
It works perfectly until you buy a 2nd vessel, since the medic never wants to flare more than one unit until you restart the game.
How would you get around this?