There are 12 alchemy buff potions, namely Defense, Speed ------------- Shinigami (I'm lazy xD).
Among those 12, 3 are considered "trash", they're Benediction, Faith, and Will.
I think it's a waste of memory space to even leave them in the game so why not improve it?
Will (Move Speed Reduction Immunity)
Why not make it All Speed Reduction Immunity instead, maybe it's still not that good but at least, it's way better and I think it'll be good in PvP.
Benediction and Faith
These potions add Max HP and MP respectively, which is basically meh. The V version of these two adds 1.5K points only. Frankly, Enriched Potion IV are way, way way, better because they restore 4K points. For improvement, why not make it drain? I, II, III, and IV, leave them as is but for V, maybe make it drain 1%? Maybe it'll become useful for other players.