Some players like to DoW Austria ASAP and take her out of the game.
Personally, I find the frenemy approach better from my experience. Early on, you will ideally be Friendly with Austria and every luxury/strategic resource you have gets sold to Austria first. The goal is to continually deprive Austria of cash.
Also, continually bribe other AI's to DoW Austria. If necessary you can also bribe Austria to DoW others but I'd rather not give Austria any more money.
If you have a decent reserve, you can try allying with any City State that Austria tries to get (if you do this too much you will piss her off though).
It's tricky to manage her right, but if you meet her early or mid-way through, you can often keep her under control.
Personally, I find the frenemy approach better from my experience. Early on, you will ideally be Friendly with Austria and every luxury/strategic resource you have gets sold to Austria first. The goal is to continually deprive Austria of cash.
Also, continually bribe other AI's to DoW Austria. If necessary you can also bribe Austria to DoW others but I'd rather not give Austria any more money.
If you have a decent reserve, you can try allying with any City State that Austria tries to get (if you do this too much you will piss her off though).
It's tricky to manage her right, but if you meet her early or mid-way through, you can often keep her under control.