After yet another Cracked Egg with nothing but a Cobra Hatchling in it, and the bigtime raiding proto-drakes constantly getting dropped out of the game, there's really only one other option: the Red Proto-drake, a reward for the Glory of the Hero meta-achievement. It's not easy: you've got to not only beat all of the heroics in the game, but all of the hard mode achievements for each of them. Guides like our OverAchievers can help, and a really great group to go along with helps more, but some of the achievements are so tough they need extra attention.
The Oculus' achievement, however, is one that needs an even closer look. And 4 Haelz kindly provides exactly that, with an in-depth guide to toppling two achievements in one, both the Emerald and Ruby Void, by doing the boss with five Amber drakes. The Amber drakes are usually meant as DPS, which makes this fight extra tough: you can't take much damage at all, because you can't get any damage back without healers. So what it requires, instead, is communication and coordination. Basically, you use the drakes' Time Stop ability to slow the fight down, and then try to do some coordinated kiting while DPSing like mad, all the time hoping that you can bring him down before he takes one of you out.
As Bell says, once you get the idea (and have wiped a few times -- you should probably be riding the drakes naked, since not only does your gear not affect their performance, but it'll save you repair costs), the fight's not actually that hard to pull off, but it's the learning that's going to hurt.