Or you could just... do the fight for the challenge? Or to help someone else pull off a clear? Seriously, I've tried tanking him and only got to ~65%, but this fight is -awesome-. And the rings are a pretty good secondary ring once you've got your restored soldiery ring (most of the H.Allagan rings are godawful...)
I mean, hell, you might as well start complaining that Leviathan dropped a shield for white mages when 95% of i50+ WHM weapons are two-hand, so to get -any- use out of this wonderful drop I got I have to either farm for a tidal wave wand (and then still be less effective than the animus weapon I'm about to get) or pay eleventy billion gil for an HQ melded Garuda/Mog wand. Or hell, why weren't you around complaining when Ifrit dropped ludicrously useless i60 weapons that were easily and hilariously outclassed by even a crafted Sarnga/Mailbreaker/Alkalurops/etc. I wouldn't mind buffing up the ilvl a bit on some of these rewards either, but this stuff is far from garbage.