_Finally_ nailed Warlord Gold and got my second slot for forbids and...I have no idea what to put in it. My first slot is Bloody Sigil, because it comes up useful so rarely I don't find it being around to be worthwhile. Maybe I should let it out for conversion bait purposes, though.
My next guess is Rock Heart. I grab it once in awhile, but the benefit is minimal even when I'm doing a KB/PISORF focused character. It doesn't even make terribly good conversion fodder. I'd drop Spoon in there, but there's a lot of times at level 1/2 that one damage can make a difference and it's a small slot and one gold. I'm planning on getting at least four forbid slots from all the Gold challenges and most of the stuff that was utter crap during the beta got made at least marginally useful, so it's hard to decide what to forbid. Blue Bead probably only helps out half the times I see it, but that's not bad at all.