I would guess stamina potion restore a certain amount, but I never used them.
I don't think having the divine skills early would effect the teleporter pads.
This is probably due to replacing your story files to get past the crash with the succubus. You can use the teleporter pad because my story files say it has already been activated, but you can not teleport to it because information in a different file in your save says it has not.
You will have problems with some of the side quests in Verdistis also, as I explained before.
Since you can run in a new game, then something went wrong in the council hall. I don't think this could be directly related to replacing the story files. I still have your save, though, and will check....
I loaded your save with my story files, killed the succubus, quickly went through the conversation with Zandalor, teleportet to Ars magicana, and had no problems running.