I read that they give enhanced gains, such as instead of gaining .1, you gain like .4 or somesuch. But what im wondering is... they last for 15 minutes. Do they increase the chance to gain at all? I mean... they seems almost worthless to use if you are up in the 115+ range as you can easily easily go 15+ minute without a single gain. When would be a good time to use one of these? I mean at low levels skills already go up fairly quick. and at high levels I can see how you could easily pop a scroll and then not get a single gain!