Claymore 5.2 and 5.1 are very unstable for me and crash either at launch or within a few hours in ether only mode. Using rx 480 with catalyst 16.7.2 drivers win 10 pro. GPU's are undervolted and underclock with mem overclock. this configuration runs stable for weeks using genoil.
So why don't you stick with genoil's miner? He also charges no dev fee.
I get extra 10 mh on my rig with claymore miner. 2.5 extra per card x4 cards