[Fantomen]

I was uncertain of the details of regen scaling with Nature magic so I tested it.

The scaling of regen with nature magic skill seems to be 1 point of regeneration per level, regardless of hitpoints. So for example a Pan with N4 casting Personal regeneration will regenerate 7 Hp per turn (10% of 27 + 4 Nature skill)

This scaling works for the spell effect and blessing, not for items.

The Path bonus is only applied once per unit, so casting personal regeneration on top of a blessing does not double the bonus. So for example a N2 Warrior sorceress with N4 blessing will get regeneration 3 (1 from bless + 2 from Nature skill), but casting personal regeneration only increases this to 4.

This actually means that it's more significant for low HP thugs like Oreiads than it is for big dudes like the green dragon, but the green dragon still gets a significant boost from it. A Green dragon with N7 (9-2) fighting in friendly dominion with Personal regeneration and Ring of regeneration clocks 40-60 regen/turn depending on dom strength. Not easy to kill with pointy objects.