No matter how good your construct is poe chaos orb from rsgoldfastcom JK's blog

No matter how good your construct is, you won't get poe chaos orb very far in PoE if you are too simple to kill. Therefore, you have to make sure your character has lots of defense. This is no less true of the Arc Witch. Block is a good way to enhance your defense, as it supplies up to a 75% chance to completely eliminate attacks and spells.

Good sources of Block would be the Ascendancy Skill, Bone Offering, in addition to other passive abilities and equipment. An important caveat of Block is the fact that it doesn't mitigate damage over time or other secondary harmful effects.

A fantastic way to compensate for Block's inability to mitigate damage over time is conducting the Keystone, Mind over Matter. MoM is popular in a lot of builds in 3.3, for good reason. MoM takes 30 percent of incoming harm from any source, and redirects it into the mana pool, rather. In other words, 30% of the life you would have dropped, becomes lost mana. As long as you can keep your mana pool topped off with adequate regeneration, you will enhance your endurance substantially.

The Arc Witch is not a passive construct. You have to poe skill tree be constantly on the go, and in your feet. You also need to have the ability to keep track of the timing of a lot of different skills, fans, and other items. If you are not on top of your cooldowns, you will not be getting the most from this construct's rotation.