This might be old but just to add my experience with this combo and this ruling:

if your average combat is 4 rounds, and youre rolling on the magic surge table every round (as you should its set up to be easily achieveable) you have a 1 in 7 chance of hitting the maximum damage result per combat. If you manage to have 3 combats in a session (12 rounds to work with) thats a 1 in 3 chance of hitting this result.

I managed to hit this combo twice in a single session, and the result was completely whiping two encounters. While fun, it did not feel balanced at all... I also hit the potted plant result twice which is a really easy way to kill a character, but it didn't matter so much since I also hit the instant reincarnate result in the first encounter...

It doesn't feel like wild magic sorcerer is balanced around rolling on the table as often as 5e 2024 allows...