WD spells actually increase the damage taken by the enemies, rather than just stacking with other damage buffs of the team, so slam dance is not additive, but multiplicative in the damage calculations with his other debuffs and damage potential. My math behind this is the 115% damage debuff potential from everything include HT, and the 30% you get from slam dance (ignoring the attack speed). Slamdance makes for a 130% of the damage of the dps class, excluding attack speed again, then you apply the 115% from debuffs to the enemy, which is between 149%-150% damage increase for each party member. "edit: so the answer is:" Nerf the witchdoctor mercilessly and then increase his damage output a little bit to be competitive.
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WD spells actually increase the damage taken by the enemies, rather than just stacking with other damage buffs of the team, so slam dance is not additive, but multiplicative in the damage calculations with his other debuffs and damage potential. My math behind this is the 115% damage debuff potential from everything include HT, and the 30% you get from slam dance (ignoring the attack speed). Slamdance makes for a 130% of the damage of the dps class, excluding attack speed again, then you apply the 115% from debuffs to the enemy, which is between 149%-150% damage increase for each party member. "edit: so the answer is:" Nerf the witchdoctor mercilessly and then increase his damage output a little bit to be competitive.