2 stress.If you are concerned about the quantity of stress, for comparison Paul Heavers Stressbot Y-Wing with BTL and TLT can dish out 3 stress per turn. Okay it has no 360 arc to do it but it isn't limited to Range 2 either. And it costs 26 points.
I am sure this is hellofa lot more efficient than outfitting the Ghost for stressing.
TLTs second attack skips the "declare target"
so only 2 stress from StressHog.
but yep, R2-3
Yes in fact, when did they actually rule this, because i remember it being unclear for a long time (and if you could pick 2 different targets)