For an idea of their HPs, I randomly killed 10 of these from all over the zone. One on one, strictly melee damage, no heals allowed, went as follows:
1 - 228
2 - 276
3 - 216
4 - 280
5 - 218
6 - 214
7 - 228
8 - 252
9 - 217
10 - 235
So they have on average 235 HPs, give or take depending upon level and necromancer buffs.