So, should I place you to the right of Ples?

No, leave you where you are now.

I outlined the conditions for Arandor, and we can come to an agreement with you.

What conditions? We are still shaping the map. What kind of player are you? You don't have any special rights. Moreover, in the expedition, we will be individuals, not states. Even if you grab something now, Revant will still be in charge of the states. So, think like a player, not as the head of Saenskresia. More borders (especially land borders) mean more diversity for the plot. We need to divide and not overcomplicate things. And you are already giving away some pieces of territory. You won't be playing as these countries anyway.

By the way, the Sultanate can be placed in the very center, since its owner isn't participating in the discussion. ;)