I know my age has addled my brain so I forgot to mention that each avatar level can only be achieved once you reach the xp required and then you have to do an immortal controlled quest. And of course, the third requirement for levels 105+ is to challenge an existing avatar of that level.
The numbers of each avatar level needs more thought, but I am just going to throw some rough ones now:-
110 - 3 avatars
109 - 6 avatars
108 - 10 avatars
107 - 15 avatars
106 - 20 avatars
105 - 30 avatars
104 and below - unlimited
RPerly, this can be explained by the balance of the pantheons. The greater gods will always be wary about balance, and having mortals becoming almost god-like, they must control the balance of power, and to ensure that these demi-gods do not get so numerous that they may take over (kind of like what the greek gods did to the titans). So because of these limited positions, there will be jostling for places.
Being an avatar is an indication of your mudding prowess, your awesome questing ability, your destructive ability against mobs, and your respect earned amongst your mortal peers, whether that be through your greatness, or through raw might of a pk challenge.
So the powers of 105+ will be significantly better than of those below because of the limited positions.
So who to challenge when you have attained the ability to reach 105? My initial thought was, there should be a ranking system based on pk challenges. If someone wants to be ranked higher, they can challenge the higher ranked player of the same avatar level and this can only occur once per month. The winner then gains one rank, and the lose drops a rank - players cannot challenge two ranks above them, they need to win against the one above them, before challenging the next player.
Any new player ready to reach that level then challenges the lowest ranked player of that level.
The biggest issue with this system are players who disappear for long periods and so other players cannot challenge them. I'm up for any solution to this problem, but one solution could be the absent player temporarily loses a level every several months, and so freeing up that slot for new players, and when they finally do come back, they can then challenge a player from their ORIGINAL level (even if they went down to level 104 from 109) and if they win, they regain their old level. Of course, the absent player goes down to level 104 before it stops, because this is the level that does not require any challenges.
As I said, this is a work in progress, I do not have a neat solution to everything, nor are my ideas firm and concrete on this matter. More research needs to be done, but I think this will add an element of excitement to those that pine for remorts, and have nothing else to do once they achieve everything.