Marlin & Delta, some questions (2 replies)

A few questions about marlin & delta printer:

1. How do G33 and G28 play together? Which one to execute first and does the calbration of one affect the calibration of the other?

2. I have two hotends and one z-probe that are offset on the effector like so:

+——————————+
| . . . . . . . . . . . . . . . . . . .|
| . . . . . . . . . P . . . . . . . . |
| . . . . . . . . . . . . . . . . . . .|
| . . . H1 . . . + . . . .H2 . . |
| . . . . . . . . . . . . . . . . . . .|
| . . . . . . . . . . . . . . . . . . .|
| . . . . . . . . . . . . . . . . . . .|
+——————————+

The plus being the center of the effector.
How do I need to set offsets for hotend and z’probe in the firmware config?