Potion Improvements

Potions are all-around problematic in UO right now. This proposal just deals with a couple of elements.

There are more ideas here, and I am glad that UO developers have expanded alchemy over the past couple of years with features such as enhancement jewelry, alchy bonuses and new potions. However, the above changes would significantly improve the way potions are used in combat systems (excepting the reduction change, which has nothing to do with combat).