Doc, unless you get a better idea ...
step one. you cancel that airport tower with that thing. that should suggest everybody around that Dawgs went stupid and offered some demonstration in their neighbourhood. The customers, will probably get nervous, they are doing illegal business, and they don't want to get into some gang wars that erupt here all the time. The Dawgs themselves, will only get more nervous then they are already. They know it's not their fireworks, and will probably start suspecting their customers doing something fishy. Either way, they either wrap up their business quickly or abandon the deal.
step two. customers move out of the Dawgs compound. You cancel their car, mind you, don't blow it, just shoot enough to tremble the shit out of them. Customer will think (correctly) they are under attack, and (incorrectly) that it is Dawgs - having completed the deal, funds transfered, decided to kill of the customer. Dawgs, will know that (again) it is not their doing, and will know, that shooting of customer on their turf will wreck their already weak reputation, they could pack the business and move away. So they'll act to defend the customer, loosing all hell against us, most specifically, Barghests. You need to be standing on the street I'm affraid, otherwise, they won't let them loose.
step three. we need to wait long enough that the customer could flee. Then we need to put the Barghest down. I know shit or less about them, but they are fucking paracritters. That is animals, once launched, they'll run straight, or maybe a little circling, but no napoleonian tactics here. First thing they should run into should be something shocking, they shoudn't have anything to help them. If you're good with grenades you could try flashbangs, but if you miss, you're dead, so I advise against it. I'll mount doberman with with taser on the car, so you'll get more darts in the air.
step four. with Barghest down, they'll need to move lynxes and people in cars, so we'll flee, but slow enough that they will follow us. and when they reach our previous position, they'll find a box with a gauss rifle. BAM. S-K VTOL should be combat landing around that time.
check mate.
Something go wrong, I'm in the car, you jump in we leave the gun here, Dawgs reputation is shreded anyway.
OOC: all the above assume, that we start outside of the fire range from the weapons in the Dawgs compund. We need to take advantage of the supremem range of the assault cannon.
it also assume there is a long enough road leading to the HQ main gate, so we could target the customers.
Once Thermo approve, 11 - you can start rolling.