Demon Slayers can freeze bosses.

The simple idea that I've used this skill about 7 times already successfully and that it has done absolutely nothing for those exact 10 seconds with 6 people or with only me. Just because you can fail a solo doesn't mean a smart party can't utilize this effectively, because this is really broken. It has a 100% success rate at max and the monster cannot do anything, in the SS you showed me above Horntail is about to do a seduce debuff hence it's doing something.

And if i had 6 demon slayers in that HT run it would have been dead 30 minutes ago by their DPS alone.

You still haven't come up with 6 demon slayers. :/ Until then, point is moot.