phroggonalog
Dalayan Master
Considering the rings can be finished off by a level 55
A highly twinked 55 that has no need of the final reward, sure. I duoed the final step over the course of maybe a couple hours (?) or a few hours with my 57 paladin and magician, and they were not poorly geared in the slightest (magician had better than DI 3.5). Even then, I needed outside help for the final boss.
I think the foci are actually right on target.
See what Salarus said, also throw in the fact that it is really easy to buy a comparable or better focus