Heh, this was the name I gave to a “Wizarding World” micro-hack I threw together for my wife and her friends. Which I realize is zero help to you but… great minds, I guess, huh?
Anyway, to the point, seems like a campaign with this theme could very nearIy already be played with vanilla Blades, no? Just need to develop the magic system of the Shattered Lands a little more maybe, in advance? But seems like you probably want more “traditional” magic for yours and, well, wands?
Given the above, I think your first step is to decide what your Scoundrel types are, yea?
So, what makes your different types of Mages different? You going with a D&D-like Schools approach? Where each Scoundrel type is basically a Specialist caster? Evoker? Summoner? Enchantress? Illusionist? Necromancer? So on…?
Start by basing their Abilities off of already extant Abilities from already extant Scoundrels, and you’re off to the races, yea?