would you say he's

1. a joke

2.kind of powerful

3. reasonably powerful

4.overpowered

Very powerful. allow him to prepare for a situation and he can probably make any spell conceivable. He could whip up trouble on the fly no problem. Summoning, Lightning, Infernos, force blasts. There is a limit compared to classic strange but strange's powers are still so varied to how he can approach enemies.

a joke

Strange is the word for his power I'd use. Unable to do things he used to do without a thought. Then randomly powerful for a bit. He's not exactly a joke compared to marvel where it's at, but when compared to where he used to be at you can see why people call him a shadow of his former self. He was more consistent in all the first 30 years than in his last 5.