What part is everyone having a hard time beating? Also leave a comment explaining what's keeping you from advancing to the next stage.
My team got all the way up to oryx on both our main characters and alts, haven't really tried to beat him just yet, but will give it a go today.
Edit: It seems that most people are stuck on Golgoroth or Oryx. I looked for videos on how to beat Golgoroth from the perspective of the person distracting him. I couldn't find anything so I kinda had to figure it out on my own. Here's a video of our first Golgoroth completion from my point of view as one of the guys distracting him. Our method has been fine tuned since then and we can now kill him in just over 2 runs into the pit. One really helpful tip for doing a lot of DPS on him while your in there is to have 2 sunbreaker titans in the pit, and take turns hitting him with your melee to burn his defences and make him take more damage from you and your alies. We found it helped a lot more than just weapons of light. Also have a nightstalker tether him so all hits are critical hits.
http://youtu.be/4KiRHPSugAM
Edit 2: 100+ comments? Thanks guys
Edit 2: it's 3:30 am and my team and I finally beat oryx! Thanks for all the replies in the post guys I didn't expect this much attention!