Group buttons in the action bar:

Publish (Publish, Publish Later, Publish and hide etc.)

Save (Save, Save and Exit)

Workflow: 2 buttons (with comment and directly send to the next stage)

Wireframes provided and Live prototypes user tested. Solution chosen by users:

• Single button that displays a dropdown with all the options available. Each of the actions, shows specific action icon and label;
• Negative actions are at the bottom of the action separated with a line.

Behavior:
When user hovers over the grouped button dropdown will be shown.

Suggested use of Bootstrap's Dropdown component