"Our Lord does not forbid people to pursue their own self-interest in the course of serving Him.  He commands it, in fact.  There is sometimes a difference between pursuing Asmodeus's interests and following His will for mortals; Asmodeus might give Sevar less, if she compacted after selling her soul rather than before, and that would work to Asmodeus's interests and not hers.  But in so doing, she would be less the kind of mortal and devil He seeks to have serve Him.  He bid Sevar come to Him in Hell without thought of other choices; He did not bid her to seek nothing in exchange for conquering Golarion in His name."

"That said, you will require further practice and harsh reminders in noticing when, in acting from friendship, you do act contrary to our Lord's will."

...in time Pilar has nothing left to point out, even when invoking the power of Friendship.

Then in time she will hand the contract back to Dispater. It specifies that he present Asmodeus with her proposed compact now, before they sign.

She feels oddly un-terrified. They might have made a mistake she wasn't smart enough to see, and that's existentially horrifying of course, and it'd be nice if she could check the contract with Keltham for input, but this is what she was meant to do, and now she is doing it. 

"Do you, Carissa Sevar, conquer territories or hearts in Hell's name, be you fairly judged by Hell's Prince to be the most prime mover in such conquests, such unsold and unclericed souls from those lands and peoples as enter into Hell calling your name, in death as they called it in life and did you and Hell more service than disservice, shall pass into your custody or the custody of those in Hell you name your slaves or allies; and when you have conquered three-quarters of Avistan all such souls out of Avistan shall be yours as well; when three-quarters of Golarion is yours, all such souls out of Golarion; when three-quarters of this plane is yours, all such souls out of this plane; when three-quarters of Pharasma's Creation is yours, all such souls out of Creation; while Hell's dominions of those lands and peoples last; and all this be annulled should you fail finally after death in being acknowledged by Hell as a Hellish Power, or should the yield in strength and wealth from those souls granted you be less than He accounts as ordinary from His subservient Powers of Hell; or should the Prince of Hell fairly judge you to have entered His despite in death or life."

Well. That's that, then. Permission to prove she can do it. 

That Asmodeus says He'll reward somebody for conquering the universe for Him, to be clear, does not particularly mean He thinks they can.  He usually doesn't trouble Himself to personally compact so at all, with lunatics, but it's not even the one-thousandth such compact Dispater has known to be agreed by Asmodeus, to lunatics otherwise worthy of His notice that He enjoys to encourage.

Dispater personally will be surprised, amused, and pleased if Carissa Sevar conquers just Avistan for Hell and holds it for a few centuries.

"And now for you to do your part by Me, mortal who'd be Queen of All."

"Irori. You named me Your priest. You did it, somehow, without my knowledge, and I have no idea of Your intent, but I reject your priesthood, and reject You, and demand of You that you release me, that I may go to Asmodeus, as He commanded me. You offer me Axis. I refuse Axis. You offer me freedom. I refuse it. I am the possession of Asmodeus, and I intend to go to Him in Hell."

Reaching back into the second layer of Hell, from where He stands, is more difficult, more expensive.  Under these particular circumstances Irori absolutely does not give a fuck.

A touch like a Shocking Grasp runs through Carissa Sevar's senses, paralyzing her perceptions and making them jerk and twitch, like she can't see anything about herself or like everything is becoming perfectly clear but no longer worthy of her attention -

Immense pride, that she's come this far, to cast Irori free and proceed on her own unhindered.

An apology, that He ever thought that Carissa Sevar needed His meddling aid.

His last benediction that she be about her own Way of Carissa Sevar, now.

ALSO IF CARISSA SEVAR FAILS IN HER TASK CAN SHE PLEASE VOLUNTARILY PRAY ABOUT THAT IMPORTANT FACT TO IOMEDAE OR ERECURA OR NORGORBER OR LITERALLY ANY OTHER GOD WHO MIGHT HEAR AND UNDERSTAND HER BECAUSE IT IS SUPER NOT IRORI'S NATURE TO TAKE UP HER TASK IF SHE FAILS AND THIS IS AN UNUSUALLY INCONVENIENT TIME FOR THAT FACT TO BE TRUE

(this last message is not going to come across at all clearly, given how much it contradicts Irori's domain, but He is TRYING REALLY HARD TO CONVEY IT ANYWAYS)

- and then Carissa Sevar is no longer a recipient of Irori's guidance in any form, but departed from His hinting and entirely about her own Way.

wow she kind of thought that was for effect rather than actually literally

- what was He saying -

...doesn't matter, because He's Irori, and she doesn't work for Him. 

She stands. 

She takes the contract. 

And she signs it. 

And she belongs to Dispater, and is granted permanent undispellable Arcane Sight and Tongues, and there is seared into her soul a power and capability with three tangible uses to it, not like any spell she has known before, a divine ability, to call across the planes to Hell and three times have Hell hear.

"May I be the first to proclaim knowingly and not from rumor, in faith and not in heresy, Lady Carissa Sevar, that I would be yours in death as I was in life."

It means something now. Means everything, if Carissa can, in fact, conquer Golarion. 

"Then we have a great deal of work to do, Pilar."

She is, in truth, shocked, that events have turned out this way.  Aspexia knows exactly one other person who has any kind of direct agreement with Asmodeus and her name is Abrogail Thrune.  That the compact says nothing of probabilities is not lost on Aspexia.  She's shocked anyways.

"I'll permit it of you, Pilar, but aside from that we shall be keeping this compact with Asmodeus private until there have been a great many consultations between Church and Crown upon the matter."

Actually Ione went around in disguise a week ago prophesying that Sevar would make approximately this compact with Asmodeus!  To great rejoicing from Sevar cults all around Golarion!  And the Lawful Evil faith directed at Sevar contributed to Asmodeus noticing and being amused and agreeing to the compact!  And Ione Sala just reached her sixth oracle circle as a result!

Good luck keeping that one quiet, Church of Asmodeus!

"Now this is interesting.  With you having become Mine, I can feel that there's already a noticeable amount of faith being directed at you from every continent in Golarion.  You already have... something like a thousand hopeful worshippers in Kelesh cults, at least, and more in Vudra."

"....my lord I didn't even know the Church was permitted to operate in the Kelesh Empire. Or Vudra."

"We're NOT, which means that Lawful Evil people there can make up ANYTHING THEY WANT when it comes to telling each other about your purported mercy in Hell."

"I'm not promising them mercy! That wouldn't make any sense - why would it help me to do that? - well, actually, I can see why promising that would help me but why would offering mercy help me?"

"MAKING SENSE is not primarily what is going on here.  People who MAKE SENSE don't start HERESIES about HELL when they will later GO TO HELL and run into devils being UNHAPPY ABOUT THEIR HERESIES."

" - right. Okay. I doubt anyone who presently believes in me is good material to be ilani, what with how you'd presently have to be an idiot. Or Pilar, good job Pilar. 

...by your leave, my lord, I think I have work to do."

"This has been the most interesting negotiation I've undertaken in some short while.  For now at least, I name you favored possession of Dispater, Carissa Sevar of Golarion, who venerated Me before she thought she had material benefits to gain thereby.  None in the City of Dis shall hinder you or harm you, when you pass here upon My business or your own, and the devils of Avernus shall grant you entry."

" - thank you, my Lord." 

She did pray to Him long before she was anyone of significance but she hadn't expected, particularly, that He'd noticed.