Well, rather than Boros, this is Oros
(for want of a better word for the shard trios). But that ain't no thing.
In any case, though, I don't really think Black brings a lot to this deck. Gatekeeper of Malakir
requires a heavy colour commitment (and is really just pretty okay anyway), Edge of the Divinity
isn't terribly good (especially in a deck that's mainly R/W), and the rest of the Black cards are just dudes who do stuff and are pretty good, but aren't really important enough to bother with the third colour (okay, Sorin, Lord of Innistrad
is good, but I wouldn't include Black just for him). Elite Inquisitor
is a metagame choice, but against most
decks he's nothing special, so that depends what your opponents are playing. Five-Alarm Fire
I don't really see as very useful.
As for what to include, I'd go heavier on the tokens. Assemble the Legion
is probably your top card. Precinct Captain
is good as long as you can force him through, so maybe something like Goblin tunneler
(and a few more cards for him to work with) would work out. There are a lot of cards which would work out; here's a relevant Gatherer search
. Dawning Purist
and Augury Adept
look good to me. They'll help solve your problem with early plays, too.
Really, though, it seems like you could do with more token-makers. assemble the Legion
works by itself, but only comes down on turn 5 and until then you're relying on Precinct Captain
. I have to go so I'm not going to look it up, but R/W has plenty of ways to make tokens.