The Loams I would use either on fetches, wastelands, or horizon canopy thereby allowing me to keep the GY full. Also, by adding white it allows me to add
Armageddon which can be brutal to your opponent if they have no means to get their land back, unlike us (Crucible of Worlds/Lftl+Mox Diamonds in play). Cabal therapy I have in there to use by playing it, followed by cracking a fetch, getting Dryad Arbor and saccing it to recur Cabal Therapy. I can then use LftL to repeat this cycle as necessary (although to be fair I can never decide whether or not I prefer using Cabal Therapy or IoK in general). Exploration I'm still undecided in. I probably will cut them so I can run 4x Abrupt Decay and another discard spell. I think anohter combination that is being overlooked is Grisly Salvage + Eternal Witness. Think of Grisly savage as adding +4/+4 to you guys and if you pitch something you needed, use that eternal witness you reveal to get it back. Looking at your list I understand why red is good, but I think white adds some different elements I prefer while still maintaining the aggro loam feel.