So we downed Thaddius last night with about 25 seconds to spare before enrage. But it seems to me that that is cutting it a little close. After examining the DPS meters our top DPSer (myself) was at 6.7k DPS. The rest of the raid was below that but never going really below 3.7 or 4k dps.
Where is your raid tippin at, how close are you to the enrage timer? Would be interesting to see how other people do it.
We do the rotating tank, negative left, positive right, counter clockwise rotation...it works just fine.