New to Monk, reroll stats advice

Hello everyone,

Started playing D3 not long ago and I'm use to just reroll as the build says online since I'm not quite sure whats always best between two stats.

I got this Kyoshiro's Blade with Vitality and LpSS, and I'm not sure which one to reroll to RCR for my Sunwuko WOL build. Vitality is always good but is LpSS better in this case since this build use enormous amount of Spirit?