Made a post about this earlier, 75 MR seems to be the magic number to resist the druid epic which is exactly the same resist check as ensnare. The Paladin Epic also has a -100 modifier and is resisting at the exact same rate as normal stuns ( 50 MR).
Posted a few logs testing these resists
https://www.project1999.com/forums/s...d.php?t=212908