you could do EVE filters or something -- enemy-color fixing loves help. i'm actually certain that vivids are the wrong direction to take. control decks already have ludicrously good mana. the cycle must come into play untapped
i've been a proponent of fixing as a means of effectively lowering curves and increasing the number of available cards, but maybe i can cut some fat. yet 42/360 seems so low to enable a 4c deck. you might be onto something.
tentative plan:
main cube: cut EVE filters, AP lands, SOM fast-lands, ALA shard-lands, graven cairns, grove of the burnwillows; add 10 fetches (down to 54 lands)
utility lands: cut vivids, add EVE filters (or AP lands) in their place. get rid of one of the dumber B lands and replace it with Dakmor Salvage
20 fetches with 10 shocks and 10 duals isnt too many, is it?
EDIT: the 5c fixers are so powerful though. (3 of them: City of Brass, Gemstone Mine, Reflecting Pool ...) they are aggro-oriented but they're also gonna be fought over to the point where i think its better to make someone use a regular draft pick on them