You probably know that you can boost stats with the Espers, and I usually try boosting specific stats for all characters, but I also wanna get 9999 HP and 999 MP in the end.
Do you know how to do in order to reach those numbers but still being able to focus on the stats without worrying about the HP and MP loss?

For example, sometimes I try boosting Vigor and Magic for all characters, and sometimes I try boosting their specific "characteristics", like Locke with max Speed, Edgar with high Vigor and Stamina, Sabin with the highest Vigor, Terra with the highest magic and so forth.
Do you have any good hints concerning this?
I still want to max the HP and MP in the end.