I'm super confused on why they weakened their physical resistance. Here's my suggestion:
Sapphire Body: 30% resist everything, -50% attack, poisonous and lower resist (2% every hit)
Sister of Stone: Start with 10% death gaze, Start with ENDISWALL
Pureblood: Potion effects are halved, immune to bad effects (Poison, mana burn, weakening, corrosion, lower resists, death gaze)
100 conversion points grants +5% death gaze.
Yeah, it's probably an awful idea, but the synergy with whupaz will be able to guaranty a level 1 boss kill on most hard missions, (once death gaze works) but be awful on everything else. It is the ultimate one trick pony, where more than one boss immediately kills it, but one it always beats. And as for the 50% potions, for whupaz this means instead of watching it drop to 65% it will be 82%. 65+(30/2). Strength means 1 mp for 1 base damage, and schadenfreude grants 1 mp per enemies damage/2
I speak chaos.