@Hillo: Nanamo's plan was to dissolve the syndicate/monarchy and place the Immortal Flames in charge of Ul'dah. This would undoubtedly caused a civil war within Ul'dah but with Limsa Lominsa and Gridania on their side they would have easily quelled it.

I think Teledji was most likely acting alone most likely. He wanted the WoL and Scions for some reason (to trade/sell to the Ascians/Garlean? To just off so they stayed out of his hair?) and obviously wanted Sultana out of his way. It seems probable that Lolorito's chiming in after Teledji split was simply him attempting damage control. Having the WoL/Scions captured at this point was just to keep them from letting everyone know the Sultana was dead until he found a solution to this problem (I can only assume that Lolorito didn't want her dead).