In that case, 'just' use a B-52 loaded with lots and lots of PGM's. Many hours on site, lots of ammo, and safe out of enemy range.PGMs are good and all but the closer they are to the ground they can often react better.
The A10 allows for gun runs and not just PGMs.
"Oh I'm out if PGMs and Air won't be back for like 10 minutes"
Shit I need air but they left.
That is about the main thing CAS helps wirh.
Out of curiosity - how many - if adapted to use them - Brainstorm-2/3 or Hammer can the BUFF carry? I bet a fuck ton of these babies.