1). Yes, an enemy who hits an ally affected by Pain Link, would take 25% of dealt damage back as raw damage. And from what I can tell from statuseffects.gamedatabundle it doesn't go through attack resolution. The enemy just instantly gets damaged back.
- I wouldn't be surprised if those 25% are further affected by Cipher's MIG. And also by whatever damage amplification is on the enemy.
- The damage is not 'reflected'. It is rather 'shared'. As the buffed ally still takes same amount of damage while under Pain Link, as if he would otherwise.
- Only the damage that goes through attack resolution can be 'shared'.
- Iirc, Pain Link worked differently in PoE1. It was: whenever you take damage, deal 25% of it to each nearby enemy. So it was much stronger when having multiple enemies in melee; but weaker vs a single enemy that is at range.
2). It should be the a). Just like paladin's stats/gear affect his Greater Lay on Hands effectiveness, same thing goes with Pain Block.
P.S. That said, I still haven't found optimal uses for those two powers.
1). Pain Link requires you to take a lot of damage, in order for Pain Link to be worth it. Ideally your hp + healing taken should be x4 higher than enemy hp + healing taken.
2). Pain Block asks for high MIG and INT, but doesn't care for cipher's accuracy/perception. So it would be nice on a lifegiver/psion or psion of eothas/wael offtank. But only if psion focus generation wasn't paused by incoming damage.
Edited by MaxQuest, 14 April 2019 - 12:12 AM.