I did a PQI and moved it to namtar's lair.
Faithless and Priest down!
I acctualy recommend elf priest on namtar's lair strongly, if you can get viper ward + apheelsik or pissorf, the first stage goes down easy. Then just fireball the second and third form. From there on, you probary got enough hp potions to kill the two last bosses with normal attacks only, or if you have pissorf, use it for the enraged hits/death protections.
Edit : Seems I have managed to overlap save files. So I have no longer defeated namtar's lair with Unstoppable & Assassin.
Edit 2: Reclaimed my Unstoppable badge as an Orc Bloodmage
I ended up with waaay more resources than I thought, I has 4 mana potions, 22 charges on my magic ball, and 1 hp potion. The boost health from JJ was extremly usefull with the sanguine (obviously, though more than I had expected)
Edit 3: Really simple Half-dragon run