Can anyone tell me why this passive skills have hex master ?

https://www.pathofexile.com/passive-skill-tree/AAAAAgMAAP0C4wVbB2MHpQx9DkgQfxEvEVARlhSwFvMXUBpsHRQmPCftKU8snCynLL8vnTlSOjA62DvhQZZDY0bXSbJMLU3YTm1XK1gHWPVZ81orXcZd8mBtZk9mnme9bRlwUnDVcU1zU3YRf8aBSYFvghCCHoKbiEKIa4uMjHaOZI9Gms-boZ2jna6dxJ48o_KnCKcrrJisqrI4tQS297b6tzG4k7vWvDfAGsBRwFTBtMHFwfPDbcae0NDa3d3z37Dhc-L344TkIuTs5oHsGOw47SDyHfPd96b31_rS_Ks=

This post was edited by mkL86dk on May 17 2013 01:52pm

use 2 curses
ele weakness and conductivity
basically ignore 100% of their resists

i'm dual totem spark right now and using fire traps because my damage is a little low
i use elemental weakness and critical weakness works very effective

use conductivity its much better adds a lot more dmg and shock chance

if you crit you shock i was using conductivity changed and liked it better

why not go full insane mode and do conductivity and crit weakness

conductivity does -75 light res and elemental weakness does -74 to all so it helps my fire traps