Originally Posted by
WeirdJedi
There are several ways a red captain can heal themselves, but I'm going to focus on your current questions. Lend Courage doesn't automatically trigger. Right clicking generates a toggle that tells the AI to decide on when to use it. This generally means that if you are hurt even a little bit, the ability will be consumed. If you wish to manually use it, then you have to left click it while the toggle is off. Be aware that you need to be engaged in combat in order to use it. Your herald must also be within range.
Revealing Mark is a special case where it generates a condition on a target. You can use it outside of combat without generating any threat or engaging the enemy. However, the ability itself will only heal if someone in your group attacks the target and only if the people in your group are within range of the target.