I just came up with these and am planning to use them in the Strength of Thousands that I'm about to run with my spouse, and am looking for feedback. We will be running a 3 person party, with an Outwit Ranger/Druid arch, Witch/Wiz arch, and Druid/Wiz arch.
I've come up with a fairly simple way to include Ally's into Pf2e. Basically you pick a student (or faculty) to join us. The Ally can use all skills listed on their sheet (each ally has about 4), to a lvl appropriate expertise out of combat, with feats as appropriate. In combat the ally can do 1 of 5 activities,
A. debuff enemy attack and dc's by 1
B. debuff enemy defenses by 1
C. occupy 1 enemy of equal or lower lvl (basically in practice this means if there are more than one enemy they can occupy the lower lvl of the enemy's present, as long as this doesn't give too much information about the encounter away) short version occupy non boss enemy.
D. Damage enemy (equal to 2 action force barrage at current lvl
E. or heal ally, equal to lay on hands at lvl
In most cases I think each of these activities can probably be explained in different ways for different students and some may not be appropriate for the ally, but I feel like they are generic enough we can explain how the debuff, occupy, damage or healing was done, I chose automatic buffs and damage for simplicity, and I tried to make the buffs more limited than a class, because no roll was being made.
The idea is that we are a 3 person party and this will make it feel more like 4 without having to actually have a 4th full character to figure out. Also this way we can have more experiences with the fellow students and teachers, I feel we could also expand this to non-teacher/student npc's as well.
I'm a fairly experienced GM and I'm not worried so much about party wipes and such, But I'm hoping to have a roleplay heavy enjoyable experience for my spouse and myself, and we fairly often run adventures with just ourselves as player/gms.