for sorcs the breaks are as follows :hit recovery frame=hrf
8 hrf0%
7 15%
6 39%
5 86%
if you have maxed dr/block and/or max block/high fcr you will need the 39% breakpoint
if you are pure sorc v sorc or some other special variant or just mf/pvm you probably will not need fhr

hope this helps =-)