Ran the Respec TF 3 times this weekend, just for fun. I love this TF. Took my lvl 29 DM/Invuln scrapper to lvl 31 (with some bonus missions on the side). Was successful 2 times. Third time wasn't good cause of disconnects (my compy decided I'd played too much, then Guardian rebooted or something. Not a good omen). The first one we ran, we didn't even have a defender for Terra Volta. 3 controllers, 2 tanks and 2 scrappers. We ruled TV. We were tossing the coolant at each other between waves for kicks.
I really don't even consider the third a worthy try, cause all the disconnects and junk happened before we could start the second mission.
Key? levels. Levels, levels, and levels. Keep the SK's down. SK's aren't up to snuff as non-SK's cause they're missing powers and enhancement slots. Exemplars are dangerous because they're so easy to drop. Below level 28 this trial is especially hard, because you are missing key powers that you need. Levels 26-28 are the late pubescent years of your toon. The powers you get there usually change the way you arrest enemies. Above all else, keep playing. Don't tell others how to play, and learn how others abilities actually work.
) will eventually be used in other settings as well.