Well, I'd say HP should be your first priority. At 20k, a single misstep is all it takes.
So my suggestion would be a different Vast Expanse. You can get one with ~360 DEX/VIT for about 8m on the EU AH, 12-14m if you insist on a buyout. And a decent Inna's Radiance with 300-320 DEX/VIT and 50+ Poison Resistance can be acquired for <2m.
Those two should be more than sufficient to lift you above 30k HP. In fact, my entire gear would probably cost less than 30m nowadays and MP5 is a breeze. So unless the other AHs are significantly more expensive than the EU one, your budget should be plenty in any case.