As NIN/WAR I've worn these with the Tekko +1 for about a month now. I've fought thousands of mobs from TW to IT. I Parry 1-2 times per fight, but with Counter +2 I have never once countered an attack! Never.
Rasetsu +1 gear is very nice, but don't expect Counter +1 to ever come into effect. It might, but very very VERY rarely. It's not gonna save you. If you can use a few million gil for something else, do that and get NQ instead of the +1 Rasetsu gear.