Looking at things, ST shield regains 63 points/sec, which is exactly average Tesla vs shield damage. Teslas have 5 second refire so you need 5 teslas to just keep up with shield regen. But you still need to go through about 2800 worth of shield and di it fast. If each Sabre also carries 2 avalanches, with 3 sabres it is anywhere between 1800 and 3600 damage, average 2700 - not enough even for shield, and there is also about 1000 damage to be done to hull. So, on a statistical average, 3 sabres with avalanches and teslas ought to handle the shield, and do it fast. The fourth craft ought to be a dragon with extra plating and 1 plasma cannon and 2 fusion launchers. Dragon engages first with plasma only, soon as ST fires, Sabres go all out ramming speed, with Avalanches hopefully kicking down the shield. Once Teslas engage, turn on the Dragon's fusion launchers. At least on paper, this ought to work, RNGesus might say otherwise...