Ways to improve orb build

Heh. As the title suggests , I want to know what affixes are good for orb build,

except for wd+ wd% do I need ed+ and ed% ?
Is crushing blow a must have for this build?
Do crit chance include elemental dmg ?

If u have seen my build I am running with an reactor-shield type of build with energy as my main survival >>> here is link of my build

I think ed+ and ed% are important… Also crushing blow is very important because u might need it to kill monsters quickly on higher floors -25% of monsters current hp is a huge bonus for dealing damage to monsters and yes crit chance include elemental damage.