For 18 refresh a pure offensive evocator should have at least weapon 20 rotes... he'd just be awful at defense for his level and screwed if a GM took his toys.

Skills
Great: lore, athletics
Good: discipline, alertness
Fair: deceit, investigation
Average: conviction,  presence

Powers:
[-2] Ritual- crafting strength
[-3] Refinement

Enchanted Items:
Weapon 6, 15 times/day
Block 6 or Armor 3 15 times/day

I really think pure crafters are the highest powered and well rounded at low levels. Strength caps kill them at 14 refresh and above campaigns.

...  yes.  That's what I said.  And you still need initiative to use that 12 shift block

You can only block with initiative. No evocator would ever have that.  Claiming a wizard who is perpetually paranoid about this PARTICULAR enemy could take him makes him vulnerable is silly.   That's what wizards do.  They are the deadliest enemies in thedresdenverse if they know what's coming and have time to prepare.  But ninety nine times out of one hundred, no evocator is going to have that advantage on this guy.  He's easily always hidden and kills his victim before they have time to blink, let alone find weaknesses and spread the word

I wouldn't make him an NPC unless you want all your characters to quit on you in their first encounter with him.  With mythic speed he will always have the drop on EVERYONE.  With +6 alertness, even if your PC's took mythic speed for some reason he'd still most likely have the drop on them.  With mythic speed and +3 stealth no one will be able to block him.  With a fate point to satisfy every catch, he'll be able to take out everyone in a group at his refresh level in a couple turns unless they all have mythic toughness and/or recovery.

Honestly I wouldn't play in any game that had this character, whether he be a PC, GMPC or NPC.  He's insurmountable without serious plot devices as an NPC and as a PC or GM PC he'll just deus ex machina everything, leaving the players feeling cheated out of a decent gaming experience.

It's Fate.  All styles of magic are basically the same.  Just roll conviction and discipline to do a weapon whatever attack and when you complete the attack claim it was your fist.  Put aspects on yourself using magic fight with a fists skill.  It'd probably make the most sense to claim it was spirit or air magic though for satisfying catches.

Yeah.  I'd put the senior council members in at least the high 30s refresh wise.  They're out of Harry's league in Changes and he was submerged in the beginning of the series.  He's at least in the high 20s by Changes.

That is the beauty of fate.  It is so incredibly adaptable.  Pick your favorite fantasy/sci-fi/whatever universe and apply to fate to it and BAM.  God I love it.  I'm actually thinking about running a Sword of Truth campaign on PbP once I'm familiar enough with the system to feel comfortable GMing.  Seriously.  I.  Love.  Fate.