By using a risky gambit and having absolutely amazing luck.
Mirror match Imp vs Imp (Sir, is it still really a training exercise if we are using live rounds?!?). My opponent picked Hyperspace Assault from my objectives, figuring that he could use concentrated fire to crush my list piece-meal. My reserve ship was a Vic-1 with Expanded Launchers (more useful than it sounds, NO-ONE goes anywhere near the front of that thing, great for board-denial).
On about turn three (I think, it was a casual game involving a few drinks) I had the chance to drop the Vic into firing position on my erstwhile opponents flag-ship aiming straight at his exhaust ports. At that stage his flag-ship (Vic 2 with Screed on board) had taken no damage and was not under any other threats while his two Gladiators were in a good attack position so he decided to move one of them first.
He also reasoned that while the damage from my Vic would be heavy (7.25 on average) his full suite of defence tokens would mitigate that to little more than shield damage that he could rapidly repair. Vic-1's are not renowned for nullifying defence tokens after all.
Plus I was right on his rear, pointing my front arc straight at him, so it was doubtful he could have gotten out of range or arc by moving first anyhow.
Gleefully I grabbed my dice and rolled. 5 blacks and 4 reds (concentrate fire for the extra red was my command of course!) clattered across the table. The blacks came up 1x hit, 3x hit/crit and 1x blank. The reds came up 1x double hit... and 3x accuracy. All defence tokens nullified and 9 damage to the rear arc of an otherwise untouched Vic-2.
*boom*
We both kinda stared at the dice for a second, and then broke out laughing. Well, I was laughing, he did a lot of swearing.
Now I await the day that the dice gods will have their revenge on me.