We have done some test on pools and intensity. Many pools --xintensity 64 is too high. Hiveon pool gave 4-5% rejected shares.
Lowering to --xintensity 32 increased the poolside hashrate around 3MHASH on the rig. v1.10 will have a new dynamic --xintensity wich will remove stales. prelimenary tests show +20mhash poolside.