Few questions..

 

-Assuming a fairly good sorted bank, and 100% attention paid, how many potions would I be able to make in 30 minutes?

-How many gems is it/hr at rouge den, and what are the rations of gems one would expect to get?

As far as I know gem ratio is roughly:

8:4:2:1

s:e:r:d

 

As roughly:

2:1 s:e

2:1 e:r (4:1 s:r)

2:1 r:d (4:1 e:d 8:1 s:d)

 

in case its not obvious s = sapphire, e = emerald, r=ruby, d = diamond

If you are just adding seconds to (unf) potion you should be able to make 900-1000 in a half hour.