He is living about 4 builds back on the Beta where Master Marskman or Mark of Death, not 100% sure which one it was gave 5% haste and it got changed to either crit dmg bonus or less mana per shot. So SV/MM both need the same haste to reach GCD on SS.
My bad, you're right and I didn't notice. (I don't like MM, personal preference).
Zeuxis - very interesting analysis on the int enchant, ty