And you say you were /FF? Sounds to me like the bubbles were working.
Sometimes you have a bad mission or a bad TF, or an oddball team. Brutes should have kept the aggro off you.
Maybe you can get sets to boost your own defense to the soft-cap and be less squishy. Your personal bubbles + sets should make you fairly difficult to hit, and mezz-resistant.
Mind has Terrify and Mass Hypnosis - both useless in your example situation. Total Domination is cool but takes forever to recharge. That leaves some weak single-target attacks plus mass confuse. I've never gotten far with Mind before giving up.
Earth / Time has tons of controls but squat for damage, but I love to play it on teams.
You might get more mileage out of Ice Control. Jack isn't so hot but slows and knockdowns are excellent. Ice/Time would slow big groups to a crawl, /Storm would rock. It would be funny with /Trick Arrow to flop a spawn on an Ice Patch, shoot it with an Oil Slick, then light it on fire with your inherent Taser or bonus Fire blast.
Just remember - the cost's the same regardless of how many alts you have! Try another, maybe a different AT entirely. Maybe scrape the bottom and roll a Sentinel.