How long do those last?

Havn't tried making any ;x

But having a combination of scrolls/potions would make great.

I'm having problems on finding the NPC that sells other potion skills, does anybody know where to find them?

There are some weird potions in the end of the skill list dunno if these are the ones but just click till the end and check it, oh yeah i m high cleric now chin =P, tho i gotta go to class now >.>