I think G is the basis of any energy deck, with the Puzzleknot and Attune that you mentioned. From there, you could try Jund with Brawler, Live Fast and Die Young, along with some of the thriving cards (Rhino and Gremlins look best to me).
Otherwise you could go UG and run the huge Energy leviathan whose name escapes me...
I don't think energy decks are doable without G tho
I agree, green is the one color i saw and knew had to be my primary. a lot of that was from architect of the untamed and the puzzleknot before i saw attune, which is just sweet. after that i think one of the best pay off cards for energy is demon of the dark schemes but with BBB in his cost you might be pushing it to add a third color
So I´m really looking forward to Kaladesh and the Energy mechanic but I´m having a hard time chosing what colors would be best for such deck.
An obivious choice would be to go Green and Red with Voltaic Brawler and then take cards like Harnessed Lightning, Woodweaver's Puzzleknot and Attune with Aether but if you look at other colors, there seem to be a lot of goodies to choose from which makes it hard to know which colors to go for.
Have you decided which colors you want to use for an Energy deck and why?
Otherwise you could go UG and run the huge Energy leviathan whose name escapes me...
I don't think energy decks are doable without G tho
Modern: WURG Twin
Standard: Mardu Planeswalkers
http://www.mtgsalvation.com/forums/the-game/standard-type-2/deck-creation-standard/661834-mardu-planeswalker?comment=1
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