If you're keeping your setup go with the eth alma ... but I think Stoutwood brings up a good point on the angelics .. I think you need more ar with this build, you only have a few sources going for you (dual ravens and alma). Unless you stock up huge on AR/life charms you're going to find it hard to hit people :/ - unless you're going blessed aim route - but that's another story.
Grem
Another *possible* setup:
Helm: BerBer Coa
Plate: Eth Zod'd Glad Bane
Weapon: Eth Zod'd Razor's Edge
Sheild: Eth Alma <--- I'm assuming you've done this already
Belt: Verdungos
Gloves: Magnus' Skin
Boots: GoreRiders
Amulet: Angelics
Ring 1 and 2: Dual Angels
You lose the OW on the dracs, a +1 all skill and 35% deadly (from highlords), but you gain an astounding amount of AR (dual angels plus 100ar on the magnus skin) and life while maintaining a 4fps zeal. I think this is the best option in increasing AR while keeping your key items (coa, glad bane, eth razors and eth alma). With this setup you should be easily hitting ~20k ar, and with razor's -33% def you should have little or no problems hitting other pallies.
