:lol While I admit there is a bad matchup here lets not get hasty.
-Gold Armor has no feats besides blocking 64 palms, which isn't very destructive its a pin-point attack...saying Hidan isn't strong enough to break through to obtain even the smallest scratch is premature.
-Kidomaru's arrows don't do shit here, and spiders can be avoided (although ultimately they are what I say would win this match) but Hidan was fighting off something stronger in shadow strangle.
-Kidomaru isn't that fast, Hidan > Part one Neji in terms of speed, so it will be rough for him to get out of his view anyways.