I main a warlock but use everything. What I found is this. Most people that main a hunter can't handle the jump. Doesn't sound like that's your issue. Iron banner is once a month, so I would say do not make a decision about that character based on one event. My suggestion is this, and keep in mind this is my main character set up, but try using the void walker. It's a very, traditionally speaking, unpopular subclass but it is very effective, especially now that the storm caller was nerfed. Trust me, I'm not joking, viod walker is a very rewarding player to the ones that can use it. I still shock people with what I do with it in kingsfall. People will not mess with me like they did back in the vault days but I think the warlock is extremely rewarding, especially if you aren't using self Rez as that Will make the warlock a boring stick in the mud with less lethality than a level 1 anything (not really but you get what I am saying). Seriously, give it a shot and see what you think. Worse case, you delete it anyways and make a titan. Nova bomb at oryx. At the start have a hunter tether (obvious) and then nova bomb them. If you are running the obsidian, full bomb right back. Then after you stun oryx, let all the thrall come in, tether (again obvious) than nova bomb the shit out of them. Everyone on your team will so many orbs after the second round they won't know what to do with them. It makes the warlock have some form of purpose other than dying in the shade.