Tasha's hideous laughter (level 1) appears to be strictly superior to Otto's irresistible dance (6th level).
The former incapacitates and prones; the latter stops movement, grants advantage to attackers, and inflicts disadvantage on the target's attacks and Dex saves.
Other than that, the two spells have identical casting times, ranges, number of targets (one), saving throws and durations. The target of either spell gets a new saving throw each round. (Yes, ironically, Otto's irresistible dance is extremely resistible.)
The one slight advantage Otto has over Tasha is that the target of Tasha might get additional saving throws (with advantage) if it takes damage.
Does that really make up for the 5-spell-level gap between these two? Did I miss something?
The former incapacitates and prones; the latter stops movement, grants advantage to attackers, and inflicts disadvantage on the target's attacks and Dex saves.
Other than that, the two spells have identical casting times, ranges, number of targets (one), saving throws and durations. The target of either spell gets a new saving throw each round. (Yes, ironically, Otto's irresistible dance is extremely resistible.)
The one slight advantage Otto has over Tasha is that the target of Tasha might get additional saving throws (with advantage) if it takes damage.
Does that really make up for the 5-spell-level gap between these two? Did I miss something?