I just switched to the dstm client and having zero issues with my 1080ti. Actually Its OCed more and clocked higher than I have ever been before!
Before using a different miner (EWBF) I managed around 700 H/sec with just a +100 on the core. No benefit to clocking the memory or anything else higher. Now I can run +200 Core / +500 Mem and even run at 90% TDP and get 752 H/sec! If I run at 100% TDP I get around 770 H/sec at these settings. I have yet to test it further but I'm sure I could tweak it even more. So I'd say with this at v0.5.8 you can mine at higher speeds and better output.
What card do you have? I get about the same hashrates, but my miner keeps crashing... :-(
All my Nvidia cards are EVGAs. 1080ti acx which I was talking about up there and 2x 1060 6gb sc editions. My hash rates can go up even more if the card is sub 50C as it does clock slightly higher automatically.