Another thing about combat, and don't know if it has already been said but you can't stress it enough : food.
Always be on food buff, to ease your management : eat before engagement, then eat again like 1mn later so you have 2 icon (only one bonus tho), when one disappear, eat.

[Linked Image from w3.the-kgb.com][Linked Image from w3.the-kgb.com]