if we get them to swear fealty to us
Which is
highly unlikely to happen.
Orphne, being a much, much smaller court, took years of positive relationship, and promise of particularly bright future within our Empire - on top of having been effectively territorialy annexed with Braavos swearing to us.
And that's
on top of them
having a King already - and being stuck-up bastard with overweight feeling of self-importance (remember how Orphne couldn't have been seen as dealing from a position of
lesser power, even when he objectively was?).
Yes, them swearing
would be the best case scenario, but I don't think we can count on that in any way.
They've got... three dragons, IIRC. Three dragons, the resources of the Golden Shields, whatever Lanna Lannister manages to loot, etc
Like I said, they are
manageable if we are efficient - I just
really don't want to get bogged down in all the shit (read: mercs, maybe Devils/Demons if Tywin starts getting particularly desperate - albeit that has 50-70% chances of Lana shanking him herself) they can probably throw at us given a chance - not because they are that dangerous, but because we have
bigger enemies than them to worry about.
I honestly think the best way to stop it is preemptive, it's how bloodraven decided to do it. These guys went from wandering around in the woods to wielding mind blank rings and converting lords to their cause in a fairly short period of time. As far as I can tell the seven need mortal hands to reach into this world. We can solve this by killing anyone with an actual connection to them, leaving the faith under the control of dozens of conflicting heresies and corrupt septons. Every moment a strong mortal of theirs exists is another moment they have to establish themselves. I get that some of them are nice, but we're falling for a gimmick; they're supposed to be nice and make you hesitant to fight them. They even mean in sometimes, but that doesn't mean they aren't committed to fighting us. It's like we're in a sword fight and are trying to wield a blade while it's still in our opponents hand; The only thing it'll get us is cut up. If we want to use them we need to know everything they can do and have a plan to manage it, not just keep going easy on them until they hopefully flip. Danelle is the one most of the thread likes and she still reluctantly went along with the kingkiller stuff. That's what "good" opponents are like; if you aren't a monster they'll regret killing you, but they'll still do it. While we are working with them we need to keep our own interests at the forefront of our plans, even if we hide it from them.
Multiple reasons; the seven are fighting with the old gods and we are sworn to see them humbled. A task we have actively advanced through all kinds of mechanisms. They also want to be the sole magical force on the plane, in addition to being the only "true" gods, and (their faith at least) wants significant political power. We want none of that, so we have to fight it out.
Kinda
too late for that now, after how Conclave has ended - even though I agree with the statements here - we entered an agreement to not fuck with each-other, and they are free to grow in strenght now (with very minor good for
us in said agreement).
If they have even half of a brain (and they seem to), Lucan and Stranger's chosen will now gather forces, as much as they can, and seed as much agents (be it angels or anti-blood-magic preachers) as they could.
All
we could do, is to try to turn the few that will pop up -now that Bloodraven isn't actively killing them off - to our side.