The reduction appears to be Cure recast -25%
I wanted to see if if could bypass the 80% recast reduction cap, but with -80% reduction all cures have a 1 second recast even before Majesty. Kinda hard to tell. I'm not sure you can even have a 0 recast outside of quick magic procs.
Data.
Code
+------+------+---------+------------+----------+---------+--------+---------+--+---------------+-----------+----------+---------+ | | | 0haste | | | | | | | 224/1024 slow | | | | +------+------+---------+------------+----------+---------+--------+---------+--+---------------+-----------+----------+---------+ | Cure | base | Majesty | .+22% slow | Maj+22%S | Maj mod | recast | floored | | Slow mod | post slow | majesty | Floored | +------+------+---------+------------+----------+---------+--------+---------+--+---------------+-----------+----------+---------+ | I | 5.0 | 3 | 6 | 4 | 0.75 | 3.75 | 3 | | 1.21875 | 6.09375 | 4.570313 | 4 | +------+------+---------+------------+----------+---------+--------+---------+--+---------------+-----------+----------+---------+ | II | 5.5 | 4 | 6 | 5 | 0.75 | 4.125 | 4 | | 1.21875 | 6.703125 | 5.027344 | 5 | +------+------+---------+------------+----------+---------+--------+---------+--+---------------+-----------+----------+---------+ | III | 6.0 | 4 | 7 | 5 | 0.75 | 4.5 | 4 | | 1.21875 | 7.3125 | 5.484375 | 5 | +------+------+---------+------------+----------+---------+--------+---------+--+---------------+-----------+----------+---------+ | IV | 8.0 | 6 | 9 | 7 | 0.75 | 6 | 6 | | 1.21875 | 9.75 | 7.3125 | 7 | +------+------+---------+------------+----------+---------+--------+---------+--+---------------+-----------+----------+---------+
