SWIC has seen MDP2P distilled without a vacuum at 283C (made from oxone and from peracetic routes)... but don't expect the teflon on the stir bar to last for long, ensure everything is very insulated with glasswool (inc. the clamp), and your yields will be down about 10% on the recovery of the ketone...
So by comparison, 200C is rather light heating... but again, make sure you use glass wool insulating everything, including the clamp. The stir bar will be discolored... but not destroyed.
Perferably you want to do it around 100-120C with a column and insulate (if necessary, likely not) with something like fleece.