My FC group just clear it thrice last night, 2 of the run are 1 shot. The last run was longer since one of our usual DPS went as tank. I do agree that Titan ex takes a lot of focus from everyone, a simple mistake can easily leads to a wipe. We always have someone in mumble shouting to stack up or to hold and wait, because no matter how many runs we did together there will always be time when someone forgot to stack, someone move too early, etc. I am quite happy that even with the holiday season and all, we manage to put a team together and down Primal Ex, the constant practice and wipe was well worth it.