Have to disagree with your GH statement.
1) GH Pots? If you can get them let me know. Yes, there are scrolls, but my fighter UMD sucks, so I couldn't use them anyway.
2) The Heroism Pots only last 5 minutes. This lasts for 30 minutes, and is renewable.
For my Sorc, I really didn't take anything in this tree. But for my 18Fighter/2Monk I was able to max my other trees, and have AP left over to take quite a bit in the human tree.