1 XFX 295x2 at 31+31.5Mh/s
The XFX needed a Fan on the Back for the VRMs and 2 x SP120 fans for the Radiator, Push/Pull, plugged to the motherboard and set at constant 100% Speed.
Not worth it to push them anymore imo, try core 992 for sapphire 1030 model and 981 for the 1018 models, you will see that voltage drops too. Also mem speeds higher than 1250 make no sense if mining dagger.
I never found any Bios for straps or Undevolt for any of them. I could surelly use one!!
It's not that hard to modify straps yourself. Hawaiibiosreader, HxD, gpu-z and atiflash are all you need. Nerdralphs cgi-tool might help too.