Ok so I am into the whole roleplaying theme of this game. I got another one that I wanna hear from you guys. A class that goes bladesinger wizard as the main class and then 3 levels is battle smith artificer. Now I just need the backstory, any ideas?

The Bladesinger spent their martial training to handle their weapon like an extension of their own body.

The next stage of their mastery of the blade was how to forge their weapon: this can justify why they multiclass into Battle Smith Artificer.