Stinking Cloud is always worth the effort.

The best strategy for Save-or-lose spells with a Sorcerer is to grab a low-level area spell for each save (Usually Glitterdust/Web/Stinking Cloud) and the Heighten Spell feat at sixth level followed by Rapid Metamagic (CM) at ninth.

But even un-Heightened, the visibility reduction keeps it at least somewhat useful at higher levels.