Originally Posted by Maladaptive

Even with only 191 Stamina, you can still clear 480 Stamina a day (1 stamina back every 20 minutes) as long as you log in every nine hours in your case.

The higher stamina helps when you level up (refill) and if you have been away for longer than your refill takes (nine and a half hours in your case).

So get some levels, but don't worry too much about your stamina being low.

There is a massive benefit to having a high stamina though: it becomes much more lucrative to exchange a Flower Gem for Stamina, for example, to catch up with some event or farm dragons/manyus. With a stamina of 190, you get just over 2 80-stamina maps out of it. With a maximum stamina of 320, you'd get 4.