I type ‘more than’ in a sense that if you pit one zealot at 33% or 50% extra against two zealots at 0% extra the outcome might be different than if you pit them against a zealot with 34% or 51%, or rather 10 zealots vs 30, sometimes the numbers add up in a way that it is much more relevant, if you go into breakpoints often these scenarios have a lot of meaning. If you think about it, the next one I might list was 75%+, rather than something like 66%+. Something from world of warcraft times at lvl 19 or 20 you might have breakpoints like 12% critical hit rate or up to 15%, the extra few percentage points come from variations in the gear you have available, there might be an extra agility on one piece with slightly less crit chance, etc. You want a build that maximizes the potential gain for whatever it is you are best at. The different between 12% and 15% here is a crit after roughly 6 attacks vs 8 attacks. That might not seem like anything, but with a high agility score as opposed to a low agility score you may find even the lower value of 8 attacks can outpace the damage output. Furthermore your crits are adding to your abilities damage which can be more influential in some burst combos as opposed to persistent dps.
I think someone who wants raw energy and cooldown rate, such as OP has given us information that they like cooldown and energy in reavers/archon, they can gain more benefit from the cooldown/regen mastery than the warp in speeds. Most of the time reavers or archons are not being warped in the numbers that things like goons or zealots are, so the benefit from warp speed mastery is very nullified for those units, and for archons they get the bonus energy after using storms in templar form so the warp in boost is less relevant.
I don’t know what CDs would help stack up with reavers CD rate, they are 8 seconds and
Energy Regeneration and Cooldown Reduction 1.5% per point 45% maximum
Speed Increase for Warped in Units 2% per point 60% maximum
from starcraft2coop “If you use a lot of Archons in your build, or rely on unit abilities like Zealot Charge or Reavers, you may want to consider having the Energy Regeneration mastery. Otherwise, the Speed Increase is beneficial.”