This has turned into an interesting thread. SO many different ways of doing minions, and people seem to be REALLY married to the system they like best.
Well you can do minions in any way you like, the question is always just what you want to achieve with it.
Originally minions had the 2 purposes I quoted:
1. Allow the mass fight fantasy
2. Allow to easily run many enemies
With a 3rd indirect point being:
3. Make combats varied
So from this we get:
- Having more than binary states goes against 2
- Being able to hit an enemy but not kill it goes against 1
- Having high damage attacks matter goes against 3
- If you just want illusion of choice of having "minions" you can go the PF2 way as they do with "elites" just in reverse. Just call CR-6 level enemies minions and be done with it.
- If you just want the flavour of many enemies but same behaviour as normal enemies, make them mooks with HP and damage tresholds and damage carrying over (like 13th age to some degree)
- If you want spellcasters to feel good/ make martials feel bad, make it 10 HP an amount which casters with area attack spells easily can do but martials can miss
- If you want martial characters to feel good and limit power of casters: Require 1 successfull attack roll. (not saves!)
- etc

