How to I make a Naya Heroic? The land balance is tough and I don't know how to fix the key pieces.
post the start of a decklist in the standard section or whatever format you're building it for. That makes it easier for people to help. I'll definitely give some suggestions after you make a decklist.
You should figure out the cards before you do the land base. Cards to consider for the deck would be:
Heroes-{Favored Hoplite}, {Akroan Crusader}, {Fencing Ace}, {Fabled Hero}, {Akroan Skyguard}, {Hero of Iroas}, {Setessan Oathsworn}, {Phalanx Leader}
Instant/Sorcery Triggers-{Titan's Strength}, {Common Bond}, {Reap what is Sown}, {Mortal's Resolve}, {Dauntless Onslaught}, {Fall of the Hammer}, {Mortal's Ardor}, {Boros Charm}
Enchantment Triggers-{Ethereal Armor}, {Boon Satyr}, {Unflinching Courage}, {Madcap Skills}, {Eidolon of Countless Battles}, {Gift of Orzhova}, {Alpha Authority}, {Indestructibility}
I'd definitely consider running {Ajani, Caller of the Pride} because flying/double strike ends a lot of games.
Don't forget {Anax and Cymede}!
Land bases for three-color fast decks can be a bit tricky. I highly recommend shock lands ({Temple Garden}, {Stomping Ground}, {Sacred Foundry}), and don't be afraid to take the damage if it lets you cast a spell or extra spell that turn. Paying 2 life for speed is almost always worth it.
Guild Gates are cheaper alternatives, giving you lots of flexibility with your colors but slowing you down a half-step by coming in tapped. The scry temples ({Temple of Triumph}) are more expensive than gates and also come in tapped, but allow you to really fix your card draws and tuck away bad draws you don't want. Very useful.
<http://imtgapp.com/forum/index.php?topic=33529.15>
I don't know how to link to a deck haha.
Well I've acquired Anax, Akroan Crusader/Hoplite, and the other red cards. No Boros Charm/Boros Reckoner yet.