I disagree with this interpretation of the sneak attack ruling; interpreting that the advantage and disadvantage being cancelled out DOESN'T also imply that you no longer have advantage and disadvantage leads to rules wackiness where your conclusion cannot be logically true. The line in the...
Skinchanger Druid 13
Tempest Berserker 6
Adept 1
Tempest Berserker and Skinchanger Druid with the druid/berserker multiclass feat, stacking up the bonus die from Skinchanger and Tempest on your unarmed attacks, with Adept and Aspect of the moon squeaking out some extra boosted unarmeds for fun...