@roro4066 I think we might have found another point or 2 which influence where the purge comes…
the wolves are still attacking our ex main base and we have 2 suspects.
- either because we used tthralls there to make the wolves skin to hide and because we used the greater wheel of paine still …
- or our adjustments to the purge making the purgemeter full nearly all the time buffered it with “wulf area actions” that much that it virtually was full several times and tho triggered still some of the wolves purges…
we adjusted now both and hope that the cimmerians come soon because the wolves already killed all our fighter guards at the wall 
BTW: awesome thread with the archer / fighter thrall mechanics
if you want you can test if a schild / sword thrall is doing the same damage with a ironpike than a pike fighter
… i have the feeling they use less special attacks when you change their “born” weapon systems 