Idea: once an NM has been claimed, noone outside the alliance can get hate on it. If the alliance wipes, the NM returns to spawn point or it's original roaming territory. Force spawn NMs depop, timed/lottery spawns regen to full AND reach original territory before another person can claim. In this way, if someone reraises and reengages before depop/100% they can continue to work on their NM, and noone outside alliance can fight it without doing 100% of the work to beat it.

Noone should ever be able to just swoop in and finish off anything for credit without doing the work, or being a member of the group that did.