You can get 6 back per day, so if you teleport 1 time to another region it uses up your returned amount. If you run to wherever you need to go from said town, you'll break even, if you use any more than that math dictates you will hit a zero balance at some point.
So no, the current regen rate is not balanced correctly. Same goes for Guardian standing. Unless you happen to be lucky enough to be present at the exact minute you can increase it twice a day, you don't get any back. If you are lucky enough, you get 20 back. So unless you only get guardians favor for 2 leves everyday, you are going to hit a zero balance.
Was the same team who designed the UI in charge of Guardians Favor and Anima? You should buy them all calculators, because they don't seem to grasp the concept of culmative time issues.
"Don't take it personally man, white knights would eat a can of **** if the label said SE on it. If anyone dared mention that it was not a good product, they'd just argue if someone can't appreciate the subtle nuances in the ****, they should just go back to eating lolrealfood, cuz the devs prolly know more about canning food than they do."