Yes the classic formulas for dmg and debuffs are same the same as GoD. There was a test made from Innova on russian forum that showed several stuns having a 90% chance to land with no resists on. Also CON doesnt influence stun resist, while official source says it does, a test from official testign has shown having 50 or 200 CON has a variance of 1% which most likely means theres no stun resist beign given or taken according to your CON The debuff rule of debuff having lesser and lesser chance to land as its constantly landing, doesnt work for stuns. Horror is a mental/magic attack, unafected by CON afaik.