You only have to e within 6" of one single other ship to be in a squadron. At long ranges where arc positioning isn't of great worry, it's very easy to keep this spacing -- at least, it is for the Demos.
If the Vorchans don't feel like they all have to pick on the same target(s), it isn't overly difficult, either.
In any event, the explosion of a Vorchan will do approximately 3 damage (8 dice, looking for 5's to hit.... I'm actually overestimating a bit) each, so if you get 3, that's 9 extra damage ..... that, well, you could have directly put into the other Vorchans because of the amount of overkill that you wasted in the exploding Vorchan. There's zero profit to this; you're just hoping the explosion corrects for your misallocation of firepower.