In my opinion it is too high. If you are getting hit as a rogue, you are playing the wrong class…
You can see from MrMaru’s guides, he only has about 11k HP:
m.youtube.com/#/watch?v=SiLpLMb2Yv0
My original build had 100% Glasscannon and survived EP8 500+ just fine. I was poor so it took me 10~20 min to clear the map. I had super low DPS. But survival was never an issue.
My current build only has 6k hp as it is a farming build. Sadly bugs and nerfs cases me to die to aoe effects a lot XD.
As long as, the OP has enough HP to cast Stealth and attack, he should be fine. He will need to change a few things once 1.9.0 arrives but survivability should not be an issue as long as he has stealth up when he is about to get hit. XD