FW Hard: this game mode is cheating with you, and you probably didn't realize it
Straight to the point: Chaagur A1 when booked has 75% chance to place sleep on the target. I've just finished doing my 6th attempt with lizards stage 15. Chaagur doing A1 on Elva and 5 times out of 6 the sleep wasn't placed on Elva. The game is clearly cheating with the chances of placing debuff and placing crit hits too, but crits are another story. 75% means that the sleep debuff should be placed something like 3 times out of 4 , not once in 6 attempts! In one of my 6 attempts, Chaagur did A1 on 3 targets and none of them got the sleep debuff! And Plarium wants me to believe that when they write 75% it is an actual 75%! I really don't understand why they add these "ghost mechanics" and false percentages, the only thing they get is frustrating their player base.
On the other hand, one of the FW hard bosses has " " " 30% " " " chance of converting buffs in debuffs and viceversa....and OF COURSE, that 30% behaves more like a 70%.
Plarium, why don't you comment on this :) ?
