your questions regarding the game rules (improving the interpretation).

I suggest Redwight to sort it out :)

2.6.6. It is allowed to enter neighboring zones using Angel Wings, the Town Portal and Fly spells without defeating the guards. on Jebus Cross you must definitely fight, hence the general rules don't apply and we go to the rules for passages specifically for Jebus Cross + wings/fly:
- Transition between zones using the Angel Wings artifact and the Fly and Town Portal spells is allowed:
a) between any of zones 1-4 and the central zone 5, if the GO of any passage between the respective zones has been broken;
screenshot:
point 0 is the starting point for any further actions whether to the right (if the treasure zone continued there) or downwards — is there a scouting advantage here?!, if the starting point(0) is the same for further movements in any direction - /no/
point 0, where the hero stands, is the first safe place where you can land and then attack the Vivi without error, no extra steps taken by the hero along the shortest path from the point where the hero stands(at his own respawn) to the passage guard (Vivi)