I've been trying to figure out how best to marshal my forces in the Battles That Matter--i.e. the battles where some degree of micromanagement might be crucial. Most recently, I've been trying to focus-fire on capships, or target the enemy's LRMs to seriously cut down on the enemy fleet's damage potential.

I understand, however, that shield mitigation is designed to minimize the effectiveness of focus firing. So it may be counter-productive, for example, to tell my entire fleet to target one LRM at a time.

But what about the following?

I have 10 . . . I dunno. Let's say "Flak Frigates." Or fighter squadrons.
My opponent has 10 LRMs.
I've enabled stacking in my empire tree, so both my force and my opponent's force take up one icon each.

I click my "10 Flak Frigates" icon on the empire tree, and right-click on my opponent's "10 LRM" icon. Do my 10 flak frigates split their fire among the closest available LRMs? Or do all 10 flak frigates focus-fire one of the LRMs, and then do something else when it eventually dies?

If the latter, can someone suggest an alternate way to quickly get large chunks of my force to selectively attack a subset of the enemy fleet; say, "All his LRMs"?