For clusters I personally ran:
8 passive with Call to the Slaughter and Renewal
4 Passive with Blessed Rebirth and Hulking Corpses
4 Passive with Master of Fear and Evil Eye
On single targets you should be using Snipers Mark as it's a huge DPS boost. You'll also want to at least get a cluster with Blessed Rebirth asap. It states minions created recently can not take damage. This keeps dps update high as the first 4 seconds they are invulnerable. You should buy a Rumi's with at least 10 attack block and 6 spell block to supplement your shield setup.
For key items you want:
6L Fleshcrafter
% Life on block shield with life and spell block
Helmet with +1 skele craft (I have this unveiled if you need it)
Amulet with +1 skele
PoE Trade Links for the shield:
Path of Exile is a free online-only action RPG under development by Grinding Gear Games in New Zealand.
www.pathofexile.com
Or this one and craft life
Path of Exile is a free online-only action RPG under development by Grinding Gear Games in New Zealand.
www.pathofexile.com
The 6L Fleshcrafter is your biggest DPS boost by far and the shield with spell block and % life on block is your biggest defense bonus. Shield should run you 1ex or roughly 100c if you watch carefully.