well, if you want to counter those hateful hexes. And ur a Dervish u can counter it kinda easy, by either using the elite enchantment Vow Of Silence, witch grants you immunity to all spells (including hexes) witch u can recast every 10 sec with a 1/4 casting time, so not much to counter that. And your second option = Avatar of Dwayna, witch makes u able that everytime u use a skill, u gain like 45 hp and lose 1 Hex, so just carry a fast repeatable skill like pious haste or something, so u lose his hexes in a fast rate: so fast he wont be able to keep them on you because of Energie problems ^^
Sry for my bad english
Michiel B