In brief, a warpriest-style variation of the witch would make darn near exactly the character I've been trying to build since the 2e playtest.
The cloistered cleric is pretty similar to the witch, at least in those areas touched upon by doctrines, so I thought I could reasonably apply the same changes from cloistered cleric to warpriest to the witch, and get a WarWitch.
I am here today to run that concept past the collective system mastery of the forums, to see if anyone can identify a glaring problem I have missed in my enthusiasm for the idea.
First doctrine is a focus spell and focus point, which maps pretty cleanly to Phase Familiar and your first focus point coming from that.
Clerics get proficiency with one martial weapon and critical specialization with it, which is a little tricky, but I would interpret that as plain old proficiency with simple weapons when translated to the witch.
I'm eager for your impressions.