The Gadgeteer

[Unoriginal]

I got struck by a lightning... ahem, like a lightning from clear sky, with an idea, that boils down to wordplay with Gadgets and a Musketeer.

I don't want to rain on your parade (fencing pun not intended), but "gadgeteer" is already a word in itself.

Also you don't need a DM being permisive with the Crossbow Expert feat, you can just take the Gunner feat.

Now, subclass-wise, if you want to be an high DEX musketeer type who fights with gadgets, you should lilely go Battle Smith. Armorer is more Iron-Man-style power armor.

My main advice, though, is to multiclass as soon as you got what you want out of Artificier. I would either go Rogue or Fighter.