This post applies only to those <froglok shin warrior> found in Firiona Vie.
For an idea of their HPs, I randomly killed 10 of these from all over the zone. One on one, strictly melee damage, went as follows:
1 - 1213
2 - 1256
3 - 1237
4 - 1255
5 - 1156
6 - 1178
7 - 1229
8 - 1144
9 - 1195
10 - 1207
So they have on average 1200 HPs, give or take depending upon level and buffs.