Yeah, I've definatly seen where multiple reducers can really make Commune go. I dunno what I'd drop for it though. Maybe 2 LEDs, as I find I cast them more for storm count than anything. But, any time I think about dropping them I goldfish a game where they were needed for the black mana with Tendrils.
EDIT: Also, without Guttersnipe I'm not really liking the MB bolts as much. I may go with 2 more desperate rituals. But, I'm going to wait until I play some real matches to determine that. I've got about half the deck sleeved up and all but 6 cards (2 Medallions, 1 commune with Lava, 2 Bolts and 1 Ancient Tomb) in the mail to me.