Arrow Gamer - it's hard to say since the map is out of date. I suppose I'd go ally shopping - do you have any significant ones? Even Bavaria might be adequate - they can have a surprisingly powerful military. France might be a good choice, they're a good foil for Austria but unlikely to gobble them up. Are the Ottomans in contention? It might be tough to ally with them, but if you could that'd split Austria's forces. Sweden/Castille are further away than ideal, but might still be a good help. In any case, you'd likely need to send a lot of gifts, but you can probably afford it as The Hansa. Bohemia... not ideal, you might win, but it sounds like they're just as dangerous as Austria, and then you'd have an even bigger problem.
What's up in England? They could either be an ally (their navy could help vs Sweden, for example), or if everything else is really difficult, an expansion target.
Or, there's always the option of being friendly to Austria at the expense of other rivals, and saving that problem for later.
Ouch. Normally, I would have said to try and form another nation, Russia for example, to game your way out of the tribal system. Given that you have conquered deep into those lands however, only one thing left to do: KILL KILL KILL
Note: You probably should try to go back and form the Mughal Empire if possible at some point. It would allow you to get out of the tribal problem, right?
I intentionally did it this way. I'd had a successful Timurids game about a year ago that I stopped in 1437 or so due to fear of TSC and indecision about continued expansion, and decided this time I'd see what happened if I went all-out. I've played Novgorod to 1820 and Muscowy to the mid-1500s, so Russia again would be boring.
The Mughals were my backup plan in the Timurids game. This time, I plan to direct all effort westward, with no escape route. If all of Europe falls, maybe I'll go east, but if it starts caving in, I probably won't be able to reach India in time. For now, I'm happy with the Timurids dueling with the Mamluks.
Rather, I plan to eventually westernize through sliders, and then reform the government. I don't know when this will happen, though. 1530 or so is doable with a focus on it from early on, but I haven't done that. I did move 1 towards Narrowminded to help convert provinces quicker, and might not be able to afford the revolt risk penalties right away when I do reach the slider limits. So I might be a horde for quite a long time. But for now, being a horde is an asset, not a problem.
Thus, if I do take Europe, the Middle East and North Africa comes next. Asia's lower tech rate will keep it safe.
If the Horde does implode, it should create quite an interesting political situation in Europe. Even if I succeed, I might play it again from a save where I let it collapse just to see what would happen.