That's actually hard question because Berserker PL VII "Blood Thrist" allows you Recover immidietly after kill for 10 second which lead to Two-Handed weapons having 0 Recovery time during combat. At point of 0 recovery Two-Handed > Dual Wield. 0 recovery on Two-Handed weapons!
Which makes Berserker/Bleak Walker absolute beast with two-handed weapon at late/end game.
However till that point Two Weapons beat Two-handed by miles in terms of dps. So hard to tell till I see if there are some super good two-handed weapons late game.
I would to spec into Two Weapons till PL VII of Berserker where you have Blood Thirst and then maybe respec to Two-Handed Weapons to have 0 recovery on them and wreck everything. Of course it's not like 0 recovery on Two Weapons won't be as broken as you can have two strong enchanted weapons late game.
So in short - two weapons till PL VII, and then maybe Two-Handed to abuse 0 recovery on them with Blood Thirst proc.
Good to know. Thanks. Do you also have an opinion as to swords vs. axes vs. etc?