Hearthpwn

Hell all!After playing all the season with oil rogue deck lists i decide to try the old skool spell damage rogue with the new cards and the new way of playing with GvG.
So i took the body of oil rogue decks and spell damage decks and i creat that:

Spell Ninja with mini guide and videos Unknown Deck by KingMrglMrgl - Feb 28, 2015 View Deck String Export to BBCode Export to Cockatrice Export to MarkDown Export to Html Clone this deck
Minion (14) 1x Bloodmage Thalnos 1x Emperor Thaurissan 1x Malygos 1x Trade Prince Gallywix 1x Mini-Mage 2x Twilight Guardian 2x Azure Drake 2x SI:7 Agent 1x Antique Healbot 1x Frigid Snobold 1x Kobold Geomancer	Ability (16) 2x Preparation 2x Blade Flurry 1x Headcrack 2x Sinister Strike 1x Sprint 2x Backstab 2x Deadly Poison 2x Eviscerate 2x Fan of Knives
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As i wrote to the mini guide at all stages of game you depend on spell damage,removals and HUGE turns with oil and BF
I know that there some way to improve it and i am not sure what to take out for what.sometimes i am out of steam,someothers i am ok.Sometimes i need some healing and some other times no.So any advice would be great,cause on the next season it will be the only deck that i will play at ranked.
Thanks in advance for any advice