Could also dip into Tempest Cleric for a few levels. Get Heavy Armour/Martial Weapons and a 2d8 reaction damage if hit in melee at first level, and at second level Destructive Wrath, a channel divinity ability that allows a lightning/thunder spell to inflict max damage. Plus extra non-sorcerer utility spells, of course, but you probably won't have stellar wisdom without an appropriate buffing magic item.
Thematically good as well.
If per TT best get that cleric level first. You won’t get most of that.
