Now, with regards to Luseng, and the fact I need to argue for it.
A) It's rich, full of natural resources, and likely quite a few ancient artifacts, or there wouldn't be a three way clusterfuck going on there. Don't forget that because it's very important--a single country, no matter how rich, does not get a Deathlord, an Elder Lunar, and a freehold of powerful Raksha to play nice with each other to seize it. What would convince three factions that should hate each other's guts to play nice just to push the person who currently holds the place out? All three of which likely have access to First Age knowledge? Mere mineral and economic wealth isn't enough to move that many big players, and for them to not even consider testing each other. That is suspicious in it's own right. Because these sorts of people generally have better things to do then commit themselves to what will inevitably be a clusterfuck once they push the current holders out.
B) It's high value in prestige, and the greater our prestige, the harder it is for Anys Syn to attack us openly without destroying herself. Which means she can't put the "Lol, I was just kidding all along, he's actually an Anathema" card as "Hesiesh", because that would imply she was either tricked (Which means she's not infallible and full of wisdom, and thus, not Hesiesh), or that she knew all along and didn't kill him outright (Which would actually literally make her a heretic of the Faith that she herself was apparently one of the buddhas for). This forces her to use covert means, such as sending subordinates--or going herself. But if she goes herself, she's attacking us on our own ground, which gives us a massive advantage, and few of her subordinates would be a match for us, which would let us bleed her True Believers dry.
C) It gives us a chance to build a power base that's entirely acceptable, and all the while, Zao and our other allies will be working in the shadows to undermine Anys Syn's gambit--as she is limited in the ways she can act has Hesiesh. Ordering us to a deathtrap is one thing, when it really costs the other Houses and other powers that be nothing--demanding that Flame be made Emperor is another thing entirely. She has neither mind control, nor infinite power--and there is literally no argument she can make that would justify putting Flame on the throne without blowing her cover or causing Mnemon to howl in rage and expose her personally (Because if you're going to destroy the life's work of one of the top ten Dragon Blooded alive who knows that you're bullshit, then you'd best be ready for the consequences).
Strategywise? We don't even know what our assets will be when we go to Luseng, just a vague outline of what's going on. We have several prospects (Use our ridiculous predictionism to start wedging their alliances apart to buy us breathing space, consolidate, and push forward), but we can't actually come up with a fine strategy until we know we're going, and what assets we'll have when we go.