if my kingdom is 95% of your nw you hit us going all out and we don't fight back we'll eventually be below 85% in a day or two and can force cf.
The only problem is if you get learn waved your nw drops less, but shelling your opponents with ops and offering cf is still avalible strats.
I think the mechanic for undead prissoners need a backstop of some kind since soldiers counts towards max pop while prissoners do not so in case of overpopped provinces this has the potential to lead to a kill, something similair as with wizards would be good or even the possibility to turn off the conversion so they can be used as more powerfull mercs or as ecconomy boost depending on individual needs.
