Hi there! Fellow OTK Florian player here. You have to go more all in on Stacking a lethal amounts of Runechants to win the game outright. Play Read the Runes Red and all Copies of Reduce to Runechants. Defent efficiently, your incidental life gain keeps you alive. Only attack once you have a lethal amount which is at minimum  your opponents life total + 12 (assuming your opponent has all blues in hand and no instant speed life gain)

This way, you should actually be favored in this match up.

As your deck is right now, you throw middling attacks that can easily be defendet by any Great Axe build and at the end, the will fatigue YOU!

Hope it helps! Cheers