Xevan is algo used as PoW by BitSend coin, as I know there's no publically avaliable CUDA miner for this one and decided to give it a try, original dev gave up on this, so CPU/OpenCL only for this time.
I think 1070 should make 5Mhash with Xevan. Have you found souces for it - i saw only X17 on oficial page and no xevan realisation for ccminer despite what the the name says "xevan-ccminer" ))
P.S. Убьeшь мoнeтy ))) И кpacныx oбeздoлишь - им c эфиpa бeжaть бoльшe нeкyдa.
P.P.S. Have you seen lyra2z330 (lyra2zoin) gpu miner. Definitely someone made it for gpu but can't find.