The basic version tags durations to be modified with potion strength (in addition to the vanilla magnitude), resulting in durations of 15 min or so at max skill. HOWEVER, the smithing effect is drastically overpriced to begin with and you will have potions worth $30k at the highest skill with equipment boosts. A bit ridiculous to be sure. On the upside, there is little to no chance of any conflict with other mods.

The ingredient version changes the ingredients' smith and enchant effects from 30 s to 300 s duration, resulting in potions that last up to 600 s (10 minutes). This still results in some pricey potions, though it's much more leveled out and not nearly as drastic. On the downside, it modifies a dozen or so ingredients from the base game, DLCs, and Fish and Curio creation club content, which will conflict with any mods changing those. It is an ESL-flagged ESP.

So pick your poison or none. This is best I can do with it. Unless I figure out that I'm missing something.