This is my favorite choice. You will need 3 purple augments, but it wastes very little, leaving 10 gear slots and 8 augment slots to maximize your critical stat.
If you'd rather not mix gear sets, then this option is great for you! You lose out on 16 Critical Rating and need more augments compared to Option #1, but other than that, everything else is the same.
This is another good choice, although most people prefer Option #1, which uses the Advanced Proficient Kyrprax Stim. This gives Option #1 394 more critical rating, but this option gives you an extra 264 Mastery and 109 Power through the use of the Advanced Versatile Kyrprax Stim.
While this option actually gives you 79 more Critical Rating than Option #3, it involves a whopping 8 Purple Augments, which costs quite a bit.
If you find the cost of purple augments prohibitive, this may be your best option. Remember though, what you don't spend on purple augments, you will still have to spend some to buy an extra blue augment. As you can see, you waste a lot more Accuracy and Alacrity that don't give you anything and lose some Critical Rating, but not too much.
Same old story... losing 16 Critical Rating for not having to mix and match gear pieces...
Similar to Options 3 and 4, taking this route allows you a little extra Mastery and Power, at the cost of some Critical Rating. The differences are exactly the same as in Options 3 and 4, so it's up to you to decide which is the better option.
Just kidding! Doesn't work - you can't meet your Accuracy and Alacrity thresholds this way.