I find Strategist 1 to be pretty useful in my Sniper loadout (You know your enemies are aware of your position)
specially if another sniper marks you from far away as you can't hear him scream from distance.
I've never really bothered trying Strategist 2, and Strategist 3 it's useful but overpriced;
You can have both First Aid and Crafter (My favorite skills) for cheaper.
Still more useful than Collector IMO