Great for any wheels including disk hubs, as long as you're not too heavy. A wheel built with Revolutions does flex noticeably more than one built with thicker (and heavier) spokes, but it's fine for general XC and racing use.
All Revolutions spokes from us come with 12mm silver aluminium alloy nipples.
We can't calculate spoke lengths for you or take responsibility for any calculations you make. If you have any doubts please leave it to your professional wheel builder to select your spokes.