start by getting accuracy augments until your accuracy is at 110%. You can improve this by buying "Proficient" stimpack first, and optimizing accuracy around that. Should be around 2694 accuracy
Then start stacking alacrity augments, until you hit 7.14%. Going slightly above is okay, but not below! The number here will differ depending on if your guild has the "Zeal" set or not - about 2054 without zeal, 560 WITH zeal
And start dumping the rest into crit augments.
Skip versatile augments.
When upgrading your gear, *REMOVE YOUR AUGMENT* first, or it will be destroyed in the process. This only applies when upgrading trough one of the end game vendors, not when replacing modifications.