Uh, I didn't think there were Longbows in Standoff...
I take the long-distance approach to torpedo runs in WC2 because the long torpedo lock time meant that I would otherwise be a sitting duck for the target's flak. Then I would move in and release the torpedo at a distance of about 5000 before peeling off (don't want to get caught in the blast - did that once in my early days of playing!).
On the other hand, I usually let myself get close in to capship components in Standoff before releasing torpedoes so that any turrets present don't have enough time to track it. As opportunity arises, I will also try to take approach angles from where wingmen have already destroyed some turrets.