Arvus will seek out a higher vantage point, simply to watch the destruction as he now he little purpose. If he happens to see any Osokan snipers or the Rebels, he'll fire at them with his bowcaster, but by now he has lost hope of doing so and only wants to watch the final blasts of the war.
"Quite a mission this was," Arvus says to Rylis, who has likely joined him on the fact that she has nothing better to do at this point.
Coll has the walkers maintain their bombardment of the Pit for some time. He holds his comlink in one hand, barking orders until the very end of the rumbling blasts, and is applying bacta to a shrapnel wound to his thigh, inflicted by Eerin's rocket launcher.
"Hold your fire," Coll orders, satisfied that not even Drakkon himself could possibly have survived the volleys sent in. "Send the stormtroopers in to check the corpses. I want the remains of our troops removed...anything else stays until I say otherwise. I want any notable corpses to be reported to me personally."