Haha thats really confusing. Let me try to sum up. A tlt with tac shoots at me at r2 inside arc. I only recieve 1 stress even though the tlt rolls three dice twice because tac only triggers as you chose target which is only once with tlt, right? If the ship also has a stressbot on board (kwing) I receive 2 stress. One from bot and one from tac. If i get shot by a btl y with stress bot i get 2 as the bot Can trigger off of Both shots, right? So: tac Never gives two stress with just a tlt?
No, Tactician isn't dependent on choosing targets. Tactician resolves after each single attack. TLT performs two attacks, each attack triggering Tactician.
If there is a hypothetical modification allowing a crewmember on the Y-Wing you could get:
Y-Wing
R3-A2
Tactician
Twin Laser Turrets
BTL-A4
Attacking at range two.
Declare attack
Take stress from R3-A2 to give a stress to target
Attack with primary
Tactician triggers, giving a stress
BTL-A4 triggers, allowing you to start using the TLT
You declare a target for the TLT
R3-A2 triggers, giving you a stress to give the defender his third stress
Tactician triggers after the first attack, fourth stress
Second attack, no declaration of target
Second attack resolves, Tactician triggers for the fifth stress.
And that is why we won't get a crewmember for the Y-Wing anytime soon.