No that is the not the max you can get damage wise for lvl 20 legendary scythe. And there is no way you can get that scythe in game. I am not talking about the damage. I am talking about the 2 elemental types AND tenebrium. The only item with such kind of state is the unique dagger Snakebite. Plus, if you acquire that the conventional way, it should be quite obvious that the damage in none of those slots are maxed. Unless you use something that tells you that those were max. I call BS on te scythe.
Slightly less damage? Go read my post again, not only bosses and AOE and stuffs . 20% being slightly less then 2 h is ike a C is a slightly less an A. lulz