I have a Monk/Bladesinger built just for fun, never played it...but I think it is going to destroy. Also, mocked up a Rogue Swashy/Bladesinger...being able to use sneak attack all the time if no one is around your target, and instead of Haste put up Far Step while Bladesong is up, sounds like a fun time! Here is the thing, the above debate was all about min/maxing, but it did help out a bit. I would hope most people are more included to have fun with their characters and use different spells, not just looking for ultimate damage.
Here is my thoughts on 1 vs 2 handed weapons (just so you know I train with most HEMA weapons and used to fight many longsword tournaments, not that any reality comes into play here LOL). Even if holding a two handed weapon, you can easily take on hand off to cast. Technically Wizard staffs can be two handed, if you think about it...one handed or two handed should not matter for casting, just duel wielding. In that case, you need a focus item for casting imo. Wizards are really only squishy due to lack of hit points; toss on some med armor and med armor mastery and take tough, that changes everything...though it sacrifices some other more standard Wizard Feats, but that is the fun of roleplaying...
True, you only need 1 hand to wield a 2-handed weapon when not making an attack, and staffs can be used as versatile weapons. Dual (not duel) wielding is where you start to get into trouble, since even if one of your weapons is a focus (like by using Ruby of the War Mage), you still need a hand free to cast a spell with somatic components that doesn't have material components. That's why the War Caster feat specifically allows performing somatic components of spells even with both hands occupied by weapons and/or shield. (At least you removed the Dual-Wield feat from your subclass.)
It sounds like it'd be more interesting to lean into Strength for this subclass. Replace Acrobatics proficiency with Athletics. If your Wizard is going to have medium & then heavy armor later... For the Fury, you could replace the AC bonus with a temp HP pool, the Acrobatics advantage with advantage on Strength checks, and add your INT to Strength saves (minimum 1.) Maybe have it be Dwarven in feel if you want to give it flavor.
Heh, do not mind my use of Duel vs Dual, it will happen lots since I use the word duel so much when talking swords!
I like the idea of a hp pool, but that may be better for my War Mage build...maybe I will drop heavy armor on this one, and save that for War Mage...like a heavy armored Morrowind Sorcerer.
True, you only need 1 hand to wield a 2-handed weapon when not making an attack, and staffs can be used as versatile weapons. Dual (not duel) wielding is where you start to get into trouble, since even if one of your weapons is a focus (like by using Ruby of the War Mage), you still need a hand free to cast a spell with somatic components that doesn't have material components. That's why the War Caster feat specifically allows performing somatic components of spells even with both hands occupied by weapons and/or shield. (At least you removed the Dual-Wield feat from your subclass.)
It sounds like it'd be more interesting to lean into Strength for this subclass. Replace Acrobatics proficiency with Athletics. If your Wizard is going to have medium & then heavy armor later... For the Fury, you could replace the AC bonus with a temp HP pool, the Acrobatics advantage with advantage on Strength checks, and add your INT to Strength saves (minimum 1.) Maybe have it be Dwarven in feel if you want to give it flavor.
Helpful rewriter of Japanese->English translation and delver into software codebases (she/e/they)
Heh, do not mind my use of Duel vs Dual, it will happen lots since I use the word duel so much when talking swords!
I like the idea of a hp pool, but that may be better for my War Mage build...maybe I will drop heavy armor on this one, and save that for War Mage...like a heavy armored Morrowind Sorcerer.