Ditch most of the expensive stuff, upgrade the mana base and grab some Seam Rips
Once you've developed a solid battlefield, Porcelain Gallery turns all your tiny creatures into a massive horde of giant creatures
Heres what Ill say of the Fairy support line: It might not be good enough for its own deck, but its definitely something to keep in mind for other decks
Making your opponent discard when it enters while just being a large flying threat puts on a fantastic amount of pressure and means this is always at worst at two-for-one
Yannik, Scavenging Sentinel exiles a creature you control until Yannik leaves the battlefield, distributing +1/+1 counters while Nikara, Lair Scavenger draws you cards for any creature you control leaving the battlefield with counters on it
Part of what makes Boros Dragons so appealing beyond beating up on other aggro decks, though, is that it has access to some of the formats best sideboard cards