When you pay the cost of an action, you may pay a multiple of the Energy cost to take that action as many times as you paid to do so.

If you take a successive action, you still treat them as separate actions and can choose different characters or targets for each one.

You can't perform a different type of action between the successive actions.

The only actions that can't be performed in succession are - Resolve, Attack and actions gained from Ability Cards, which state that they can only be used once per turn.