This ones pretty simple, go ahead and discuss pros/con's below.
Radar blocking internal. I would say 3 slot. Perhaps this should only block boosting, for fear of nullifying radar entirely. This would also serve as a "Nerf" to ac and orb lord by limiting the ubiquity of them.
EDIT: FakeName has suggested a much better idea (see below). He proposed a 1, 2, and 3 slot version of what he calls the "Silator". These would cut the distance you can be picked up on radar by 15, 30, and 50 percent respectively. Much less OP than my suggestion, though I see most builds carrying one version of the Silator in this scenario.
Edited by crockrocket, 25 March 2015 - 12:47 PM.