WTF. And I can't even get past 300K.
Bah, you're a WD, ignore me.
Having said that, if the WD is anything like the Wizard, you base HP seems very high.
You should really play around in d3up, specially with the sideboard "EHP Gains by Stat". It's a great way that you can test which stats you want to be prioritizing when looking at a piece of gear. For instance, you might be looking at two pieces where one gives you +90 Armour, while the other one gives you a +10 Resist all boost. Which one is better? In this case, the +90 Armour is better, probably because you're armour isn't at the point of diminishing returns that your resist all is at.
Not to mention +Armour is probably easier and cheaper to get than +Resist All on WD equipment, so it's probably a good place to start when looking to get more eHP for your WD.
Remember that you don't have to try as hard as Barbs do to get Resist All, since every 10 Points of Int, give you +1 Resist All, so from your stats alone, your already getting 250~ points of Resist all before you every start getting the bonuses from your equipment. So for WD/Wiz, we don't have to try as hard to get Resist All bonuses on high Int pieces of equipment and should look for +Armour pieces. Remember you still want a base 600-650 Resist all, so don't shy away from Resist all pieces completely, but keep in mind that boosting your Int, boosts your Resist All, so if you're struggling to find an extra 10-20 points, you can just increase your Int by 100-200 points.