You could always split the gauntlets up I suppose. But there would be side effects, as they are meant to be used together. Probably less effective in combat and doesn't induce so much rage. But maybe you would feel each other's pain as an effect of being apart? 

Or I could think of another strength related artifact. Maybe boots? I could probably do something with that. Whadda think?

Edit:

[hider=Artifact]
The Boots of the Fury. Much like its cousin, the Gauntlets of Wrath, these boots are a slick black and plated. They can fit almost any feet and provide adequate comfort. They too enhance the wearers strength tenfold, but at a different cost. Unlike the gauntlets, these boots invoke a much more feral and savage response when used. Instead of loosing oneself to rage and anger outright, the boots slowly warp the wearers mind for one purpose- battle. Soon only a craving for what bloodshed brings can sate the wearer. Only those strong willed can learn to negate this effect, but it will take time.
[/hider]

Kinda late for me, so this idea might be a little whack. I can always come up with something else if these two suggestions don't work.

Edit Edit:

I also have a couple of announcements tomorrow, so stay tuned for those. I got to bed now.