I'll stick my head in for a quick second.
Re: Power Monolith
I feel like I was reading a post earlier about the Vampiric Tutor slot in Keeper, and someone mentioned that the only Keeper players that really need Vampiric are thost that run the combo. It sounded like pretty good logic to me, so I'd say that if you go with the combo, you'll also need to make space for the Vampiric. (perhaps in the missing Mox Ruby slot? You may be safe with the -1 mana source since you're dropping to only three colors)
Also, you mentioned dropping the Wishes. I think the COP: Red/Altar Reality combo is really great to pull on someone, but you may also be able to drop that if you drop the Wishes (assuming you were playing it), giving you another MD slot. Have you thought about running Moat? Especially if you plan on seeing lots of aggro. And what about Powder Keg for the other slots?
k, that's all I have. Get a second opinion.
