1060 w/3GB RAM should do about that, maybe 21Mh/s if you get things just right.  My Gigabyte card likes 70% power limit, about +220 GPU speed offset and +1000 memory offset.  Not all cards will do that, I have Hynix VRAM, also.  Some might get a little more, but I don't know of any way to set the memory more than +1000 offset.  My card will hold a stable +240 GPU, but I get crappy shares relative to what I get at +220.  Every single card is just a little different unless they came out of the same batch, same model from the same maker.  I have my temp max at 80C which is about what it does when I'm dual mining (and yes, about 350Mh/s for Verge / XVG is what I get, although you can tweak -dcri up to the best your card will do without impacting your ETH hashing much (I limit it to 1% impact) then you might be able to get 400+Mh/s but in my experience it messes things up and I get recycles way too often instead of it running the clock out (-r 239) at four hours, which is my self-imposed limit before I restart the miner.  I was using -dcri 70 which seemed to be the sweet spot for intensity on my specific card.  The other rig is a GTX1080 with RX 580's, all 8GB mostly Asus OC/ROG/Strix models with one Sapphire Nitro+ 580 OC.

Some people insist on just letting it run forever, but my machines seem to grow a minds of their own after a few hours, so 4 hours is what I picked.  For the GTX1060 memory ramped up to 10K speed, I build the DAG in between 8 and 9 seconds.  No big woop...  I am back to single mining ETH for now, I just get too darned squirrelly dual mining.

You can not change the nVidia GPU BIOS for GTX10x0 cards, it's encrypted and won't boot if you mess with it (which is assuming you are truly a crypto genius and can figure out the encryption, which nobody else has - so far, anyway), so you are stuck with mods using AfterBurner or nVidiaInspector, etc because Claymore doesn't do memory tweaks for nVidia (or fans, temps or power limits) like it does for AMD cards.