The targeter eliminates the effect of "inaccurate" on the grenadier's shots. Shock drones also have the inaccurate special rule. It could be argued the targeter could be used with shock drones as well as grenadiers. Since the targeter only costs 5 points I am not sure it is wise to expand its abilities much more.
u are right ... but every Scout is a cost of 155pts. So if u take two of them, there is a huge number of points for just 1-3 other Units supporting
I think one of it will work with 1000pts, two of it with games up to 1500Pts and three with games more than 2000pts. And all of it with 2 or more Units of Grenadier, Dominator or shock drones
Currently running a 2700 point army for US/Martians and 3 scouts, but it's what I have, rather than play tested armies. I like AQMF as it's a B&P game, rather than a fantasy version of WWI FOW. But whatever floats your boat.
I've found that the humans often target Scouts as they are easier to kill .If they explode spectacularly they can take out near by Assault pods as a bonus. Killing a scout makes it easier to get to the 50% break point. Therefore it's never a good idea to have too many.