Jim Davis UR Wizards Mod (Standard)

Based off: https://www.youtube.com/watch?v=PeLIn-Je2Zc "You're a Wizard Adeliz, the Cinder Wind! Izzet Wizards in Dominaria Standard"

Looking to get relatively competitive with this at FNM. I've made a couple of tweaks.
-2 Fanatical Firebrand for +2 Siren Stormtamer. He made a good point about not having blue one-drops because the mana base is so low, but the ability to protect my board against control seems too important.
-1 Warlord's Fury for +1 Naru Meha, Master Wizard. High risk/reward one of I think could seal some games.
My lands are different too, I don't have Spirebluff Canal, which he has with 8 Mountains and 4 Islands. Instead of 9 and 7 respectively.
I've made a couple of sideboard modifications too (I would defintiely put in Goblin Chainwhirler if I can get my hands on a pair).
He seemed to be going on about Riddleform not being what this deck needs, but it seemed to be making a significant impact in many cases.
Any advice/ideas on making this deck more potent/consistent would be greatly appreciated!

Edit 1/6/18
Week two running this at FNM with the newest changes has had a heap of success! My current struggles are mainly against mono-red.

Edit 13/6/18
Latest changes to be made: -3 Ghitu Lavarunner, -2 The Flame of Keld, +3 Champion of Wits, +1 Island, +1 Built to Smash

Edit 17/6/18
More clean and concise. Check out edit history for changes.