"For the Thalmor, they are a threat, but not the most immediate one." Areldril answered. "Indeed, the presence of Vile's cult has delayed them, despite sharing the same goal. You see, the Thalmor does not trust Vile or his followers. Rightfully so, from my research. If my theories are correct and Vile intends to claim Mundus for his own by some means, then allowing him to carry out his plans to destroy the Towers would run counter to the Thalmor's goals. They cannot become Divine if their souls are absorbed by a Daedra, yes? So, they want the Towers to be destroyed, but not on Vile's terms. That is why they are willing to make deals with the Empire and a group of Daedra-worshipping mutts to deal with them. Even once Vile is defeated, the world will not be safe, but that is not your concern, worshipers of Hircine. It will not be your task to defeat the Thalmor, at least not alone. You need to be concerned with defeating your enemy, Clavicus Vile. The reason I have selected now, of all times, to leave the Thalmor is because my...allies needed to make sure that you do not cease your fight against Vile."

Lorag grunted. "Hmph, like he'd give us a choice."

Areldril raised his brow towards Lorag, though did not look as if he was uncertain of anything. More than anything, his expression made him look even more smug. "Oh, you may be surprised. You may not be aware, but Vile does not care about you in the slightest. You were always just a resource to him, a tool. Your souls are powerful, and I believe that Vile intended to harvest them and use their power to carry out a final, definitive strike against the remaining Towers. But, his followers did not prove competent enough to kill you all, so Vile has all but ended his efforts to harvest you. Certainly you have noticed that attacks against you have dwindled? Those who still fight against you have essentially gone rogue. Just as with the Thalmor, only the inner circles of Vile's cult know of his true intentions. The rest have been recruited through promises of wealth, power, or revenge. It was easy for him to recruit lycan hunters, and those with some personal vendetta against lycans. But, now that he is focusing on other means of carrying out his plan, they have grown unruly. Based on his actions, even the General of his forces was operating in ignorance of Vile's true intentions. I would wager that Vile's zealots may even offer you a formal peace, but you cannot accept. Not if you wish to continue having a world to live in. A few years ago, I would have told you the best way to stop Vile would have been to slit your own throats to deny him your souls, but I am afraid that would not be sufficient now. Vile is making other plans that do not require you. No, to stop him now, you simply must kill Clavicus Vile." 

Even Meesei gave a somewhat startled reaction to Areldril's bold statement. Certainly, it was a ludicrous suggestion in every sense of the word. Even ignoring the fact that Vile had access to the power of a literal god, Daedra were also physically impossible to kill. A Daedric Prince even moreso. It was highly likely that there was some other meaning that went along with Areldril's words.