It is not at all encouraged to edit the mta files directly.
Instead arrange the action groups in the order in which sequence they should be executed from top to bottom and activate the selector in the Actions dialogue for each action group.
I understand that its not encourage to edit the mta file but your response does not address if actions groups that are already created how to combine them (see example picture provided earlier)
Have you tried it?
It should be the same to have 2 action groups with some actions or all actions in a single action group as long as the order is the same.
That is not what I meant - in fact I meant: have you tried to tick the selectors in the list of action groups and have you arranged them in the correct order and then tried whether this leads to the desired result?
Yes, I believe so. I tried to add both the separate action groups together but then it ask me to create another SUPER group and wants me to re do the actions again into the one SUPER group, which would be time consuming.