One thing I've done is switched to "Map Gas". Hotter flame and less time needed to bring the brass up to temp. Less chance of the heat traveling down to the case head. Maybe a 4 or five count usually gets the job done.
I use a rechargable drill motor and slow speed and a deep socket stuffed with steel wool to keep the brass at the level I'am after. No water dump after. Just don't be in a hurry to pick up the cases.