The most common miniswarm I have seen has been Howlrunner + 3x Academies, weighing in at 54 points if Howlrunner is naked.
For 9 more points, you can instead run 3x TIE/x1 Tempests with Accuracy Corrector.
This has the greater defensive potential of 15 HP vs 12 unshielded, no offensive reliance on Howlrunner, and a PS advantage (with initiative) vs the Rebel swarm filler.
It comes at the cost of 9 additional points and one fewer ship.
There's no question in my mind that it CAN fly, what I wonder is, will it? Or is it cost/number-prohibitive?
The miniswarm is best used when forcing the opponent to make a choice between them or the solo artist they fly complement to.
At 63 points, do 3x AC Tempests restrict your choices too much?
Do they not pose enough of a threat with 6 consistent damage vs a possible 8?
(E.g., a 4-ship miniswarm stands a reasonable chance of killing a B-Wing in one round. The Tempests cannot; but they are nearly guaranteed to do so in 2 rounds and 100% by the 2nd shot of the 3rd round if not at Range 3.)