If the deck is Aggro, which I think Kolaghan is... firstly, I would aim to reduce the mana cost of my cards, Like
pyrotechnics has a high mana cost for what it does, and it only works at sorcery speed. Secondly, I would aim to get 3-4 copies of certain cards, because Aggro is a tempo deck, and you'd want a greater probability of drawing cards you need.
These are only suggestions, but:
2-3 more of Temur Battle-Rage
3-4
Mardu Runemark? (first strike and buff is advantageous)
2-3 more of
Roast (they're brilliant removal, albeit only for non-fliers)
2 more of
Dragon Fodder (maybe 1? because late game all they do is chump block)
1 more of
Dragonlord Kolaghan and replace with maybe the Kologhan from FRF or the
Boltwing MarauderStuff you may wanna take out...?
Most spells you think you won't need that cost 4 mana or more
Flamewake Phoenix. Although it is a good card, your main threats are dragons and not a 2/2 firebird
Also note:
Having 4
Kolaghan, the Storm's Fury may be risky because of the legend rule
Other than that, pretty solid.