Congrats on 15 wins. If you're in Mythic, that's a leggy pack (starting this weekend). In general, I think you are running too many singletons. If a card is good enough to go in at all, then usually it's good enough to go in 2x. For example, I'd go with 2x Black Jags and drop the Skeleton Heavy (because you are running wildfire). I think it's OK to run 1x The Hunt and 1x Falling Star (I currently am), but another 1x wildfire makes me wonder if you shouldn't just drop it and go with 2x falling stars. Tough choice.

Lastly, I would almost certainly keep 2x Pangos, drop Green Giant, and grab another Guild Enforcer. The 5 mana slot is unique - it's the last one before you start need 2+ turns to unlock another mana slot. If you aren't running an amazon deck (and maybe even if you are), I'd stick with Pangolins. Blitz on large creatures is huge. I think of them as creature removal spells that also (usually) leave a big threat on the board that has to be answered. Pangolin: guaranteed value. Raging Giant: maybe more value, but also maybe less. Ratify is a bitch.

Anyway, these are just my suggestions. Looks to me like you're doing great already!