Is Flame-Kin Zealot really worth it here? Also, with this general it just seems to me you would want more Goblins and whatnot than Wrath effects and dragons. Siege Gang Commander probably works either way.
Yes, I was thinking as well that you may want to get a bunch more creatures into the deck. Here are some to consider:
(Soldiers)
various Aurioks
Aven Brigadier
Ballyrush Banneret
Barbarian General
Benalish Commander
Boros Recruit
Boros Swiftblade
Figure of Destiny
Bushi Tenderfoot
Captain of the Watch
Catapult Master
Commander Eesha
Darien, King of Kjeldor
Daru Warchief
Duergar Mine-Captain
Enlistment Officer
Field Marshal
Flanking Troops
Gempalm Avenger
Hearthfire Hobgoblin
Keldon Firebombers
Kor Firewalker
Oathsworn Giant
Ranger of Eos
Rhox Pikemaster
Soltari Champion
Stormfront Riders
Sunhome Enforcer
Veteran Armorer
Veteran Armorsmith
Veteran Swordsmith
Also: Ajani Goldmane and Empty the Warrens
I doubt you want to completely overhaul your deck, so I'm sorry if the above is an overload of choices, but I think moving more towards a swarming army would be cool, with an equipment subtheme.