If you have 336 gear, these are the most efficient ways to get to 110% accuracy and 1.4 second GCDs. Without Zeal, the alacrity threshold number is 2054, plus the 250 buffer, and we are aiming for 2304.
A strong but expensive option, this build uses 9 Gold Augments.
A slightly less strong build, this option only uses two Gold Augments, making it much more affordable.
Another good option, this build uses only Blue Augments, making it much more attainable for the average player.
Using Purple Augments wouldn't increase Critical Rating, so no builds with Purple Augments are included.
This option is included, because if you use Purple or Gold Critical Augments, it will net more Critical Rating than Option #3.
If you choose this route, you should use the Advanced Versatile Kyrprax Stimulant, which gives Mastery and Power instead of Accuracy and Critical.
All of the accuracy from the proficient would be wasted in this build.