I'm trying to figure out what are some good and action efficient ways to shrink via reduce person for PFS.
getting an improved familiar of a pyrausta at lv3 and having it UMD a wand seems the best, but not the most consistent.
A potion requires at least a move and a swift to get out and drink with a fast drinking trick.
are there options I'm missing or ways to make either of these better?
A move and a swift sounds pretty good to me.
One other means would be to throw a couple of traits at reduce person and then add quicken spell to make it 3rd level and just a swift action. Alternately a shapechanger bloodline sorcerer can increase the duration enough (10 min/level at 3rd, 1 hour/level at 9th) that you might find it easy to cast outside combat. A shapechanger bloodline bloodrager can cast it as a swift action when starting a bloodrage from 4th level.