Have you thought about usingJeskai Windscout it would combine well with Stormchaser Mage don't you think?

KTK isn't in standard anymore.

Sorry about that it was stupid

Thermo-Alchemist instead of Sanguinary Mage?

+1 for you :)

Bedlam Reveler?

Thing in the ice?

Goblin Dark-Dwellers is a good midrange card to help you finish off an opponent by getting some replay from your large arsenal of Instants and Sorceries going into your graveyard. With the meta learning strongly on Delirum based mechanics I strongly consider Incendiary Flow because it can remove annoying threats like Grim Flayer Den Protectorand Collective Defiance for stronger removal like killing a Liliana, the Last Hope while still giving you the outlet to deal additional damage with your prowess creatures.

I definitely suggest a Pyromancer's Assault. It is fantastic for finishing your burn with your low cost spells.

Check out my instant/sorcery/horrors deck.

Spoopy Skeletons(not) of Magic