Heh, Xins is Huojin leader would be fun… mostly because he is that type of goober who plays to win and would have titanic ambitions.
Opening Moves
Well, first and foremost, there is going to be some need for real-estate shopping, to put in gently. While he wont be leaving the Horde, there have been 2 tyrants since the Huojin joined and he wants his people to have a place outside of Orgrimmar to cut down the risk to his people in the long run. He’d still keep it in Kalimdor, however, for security reasons since it would better help the horde secure the continent -and- he’s heard plenty about the growing disgruntlement towards peace in the Alliance.
Capital Creation
More than likely, Xins would make a move to have the Huojin create their capital in Dustwallow Marsh, most likely on Alcaz Island since it has a position that it is close enough to the mainland it can be supplied easily enough and ships aren’t strictly needed to secure access to the mainland. Given a new city is being built, he’d flat out invite investors from the Horde and Pandaria to take part in it’s construction. Alcaz Island is also likely renamed since it’s no longer a prison. Xins also likely encourages his Tushui kin to do something similar in the Eastern Kingdoms. Given that the Alliance sort of also is not present, Xins claims Dustwallow and the resources within it formally for the Horde and Huojin.
Economy
Given it is simply physically closer than Orgrimmar, Xins fully intends to use this new capital as a trade hub/port to his Homeland and Zandalar. Among other things, he’d make a bid to make this place a sort of food capital of the world to further bring in more people. He’d also allow Non-Tushui Pandaren to establish business in the place (Tushui not allowed strictly for security reasons). If able, Alliance -might- be allowed to visit for trade during times of peace. Times of war understandably change that.
Military
Xins, shockingly, would seek to establish a professional army of his kin that are aligned with the Horde. It would not likely be anything in large number and focus on quality over quantity. Given navies are super expensive, he’d make it something initially meant to secure their new region and ward off foreign aggression. He’d also likely look into bringing over ruby cloud serpents to bring to have something resembling an air corps.
Diplomacy
Xins would very much follow Real Politik. He’d try to keep solid positive relations with the Tushui, but would not bank on it. He’d seek to improve the general image and prestige of Huojin on Mainland Pandaria as his main bid since, in turn, it would lead to more migrants. He’d also likely make moves to strengthen and improve trade ties and relations with the Tauren, Orcs, Zandalari, Nightborne and Sindorei since, frankly, he can read and has seen the Alliance is unreliable unless you’re one of their toadies. He’d also seek to have the Huojin further influence the orcs and zandalari to further ensure that they wont ever threaten his homeland again and, if needed, can be called upon should the humans do so regardless.
Stance on the Alliance
Very simple here, it’s that the Huojin and Horde will be seen as and treated like equals, or there wont be much talk. Xins will not allow people with a venomous victim mindset try to domineer him or his people, especially when he and the overwhelming majority of Huojin likely had no involvement in the war of thorns.