Running NM wire romex along rafters in vaulted ceilings
You don't. If you're fishing cable, you don't have to secure it.

National Electrical Code
334.30 Securing and Supporting.
(B) Unsupported Cables. Nonmetallic-sheathed cable shall be permitted to be unsupported where the cable:
(1) Is ﬁshed between access points through concealed spaces in ﬁnished buildings or structures and supporting is impracticable