The best Baldur's Gate 3 Sorcerer build is one that avoids taking the chances of Wild Magic, and instead relies on their Draconic heritage.

If you choose the Draconic Bloodline subclass, your Sorcerer harnesses their magical ... which will follow along with the Dragonborn subraces. You must choose either Red, Black, Blue, White ...

Consequently your bloodline/subclass has a massive influence on your abilities - and we consider the Draconic Bloodline to be the best one in Baldur's Gate 3. The Storm Sorcerer is fine ...