Rages are actually very capable with open hand when using killshot, if you build them as dodge rages. The problem is dodge rages suck until they get hard to hit, so you put 10 points in axes and maces(because open hand is considered an axe and mace for some reason) run them as berserkers until you get 10 in hard to hit, then you unlearn 5 pts from axes and maces and take those 5 pts in total carnage, forgo rampage, because it is not really worth much with open hand, and instead take sunder armor. now you have a rage critting with open hand even again heavy armor, and both end tier skills. slow them down, say 5 or 6, aiming wherever you want, with a blood lust low enough to be precise. and carrying very little weight. this build takes alot of fights and alot of patience. im curently finishing this build in blood gods right now and will be able to tell you more about how it holds up. but with the testing through the lower ranks, so far it seems surprisingly viable.