Well, I think it stands to reason that Ajokli regards Kellhus (and the Golden Room) as a point of entrance into Eärwa. From there, I don't know that was have sufficient evidence to say he didn't well want that he tells the DûnSult he does, that is, to remake Eärwa into his own personal Hell. I think this serves him in that he'd control the "granary" and so plausibly be able to war with any and all of the gods at once.
I think the Ordeal is completely Kellhus' idea, in the sense that it is the culmination of the Thousandfold Thought. As we learn from Serwe's fight with Skuthula, the plan was for the Ordeal to fully breech the Ark itself and so to not have Kellhus face the Golden Room alone. For several reasons, this doesn't happen and as per Bakker himself, the Thought fails.
So, the Ordeal only serves Ajokli in the sense that it delivers Kellhus to the Golden Room, but I don't think it was part of a larger plan on his part.