My static team times it, so that we get a Dread into position just as Brain Jack is going off.
Single tank method, where I myself am standing directly under the boss until Brain Jack cast is completed. Once it completes, I wait one to two secs, take one step back which can turn the Dread yes.
Normally, the Dread is dying just about the time it is going to do a cleave, if not before. Homing Missiles go out, I pick them up off the group and move them away.
Wait for the next Brain Jack, and repeat ^^