The starting Arena
For a Reminder. The Chamber has a 60 ft. high ceiling, and four pillars near the center of the room that reach all the way to the roof.
I am allowing Malek to give everyone some Temp HP before the fight starts, Arthur I assume would also have used his Avenging Angel Feature that lasts an hour in advance. Egar has Mage Armor and Mind Blank already on. However because I allowed all of you to do some prep. It's only fair to allow Vecna the same, he has scryed the party, and cast Globe of Invulnerability just before they came in.
The Initiative has been rolled
Malek has the first turn followed by Hjalman. Anyone who wants to, with priority give to their creators, can tell me where they should move to, and how they should use their turns (I want this to move fairly fast so if a character's creator is not around, other people can discuss and decide on what a character does).
To note where you want a character to move just copy the arena image, and use paint or other editing software to note where you want a character moved to.