Eh, clearly I'm thick, how are you qualifying for Battle Blessing, Sword of the Arcane Order and Initiate of Mystra?
Archivists have each of those spell lists integrated into their own as a result of having access to every divine spell. Probably another one that needs a TO tag, but meh...that's kind of my MO. If I could get the same spell lists on a Cleric base it would be even better IMO.
I'm for that not being considered optimization because Archivist relies on the DM feeling sorry for you and actually giving you scrolls with those spells written on them. You can do lots of crap if the DM allows it, which isn't within the realm of optimization in the least.
That's what Leadership is for. And I never once said this won't be a big hairy mess of TO, because generally when I do some sort of thought exercise like this, it swiftly becomes TO. CO of Geomancer would be using Prestige Paladin on a fast advancing class, such as Ur-Priest, giving all the perks of divine casting with none of the ASF. Note that that also would be able to autoquicken all its spells via Battle Blessing, but lose out on the Druid list, short of being a kobold, and lose out on parts of the Ranger and Bard lists.