I was trying to dig out my Askani OHC mapping. From recollection it was something like:
Uncanny X-Men #-1
X-Men: Phoenix #1-3
X-Factor #66-68
Adventures of Cyclops & Phoenix #1-4
Askani Son #1-4
material from various Cable issues
Cable #-1
Wolverine / Cable: Guts & Glory
Cable: Blood & Metal #1-2
Further Adventures of Cyclops & Phoenix #1-4
You could go all in and label it "New Mutants: Askani Road to X-Force", adding Cable's New Mutants issues to precede X-Tinction Agenda and X-Force vol.1 Omnibus, but it probably works better as 2 separate collections, lol