The accuracy problems is something I have long been aware of, and try to cram +to hit and +accuracy onto builds. The Fear and Stun cloaks do heavy lifting on "faux defense" especially against garbage, leaving your armor and Health to stand against the bosses/AVs.
Oppressive gloom is great against big bosses/AVs and for pulling from across a room. Since it is an AoE, and controls really agro, it acts like a net pulling mobs from one direction to you.
Here is my current build
Tanker - Dark Dark v7.01.mbd