Vengeful cry savage hit has incorrect % for savage hit threshold.

You need to take 20% of your life to make it active, not 15% (assuming the wiki page about savage hits is correct)

My original claim is incorrect, it is 15%.

The real problem is that life regeneration makes savage hits not be counted as savage hits. So the point when an incoming hit being detected as being a savage one should be before life regeneration has anything to do with it.

Again, false. Battlemage's cry just does not consistenly cast Forbidden rite / the cast doesn't count as a savage hit. Manually casting works well.