While this is true, those rogues ARE taking up deployment slots in your team, where you could instead bring Memento and do the same thing with 5-cost skeletons. Granted those skeletons don't have 50% evasion nor assassination chance but they're not taking up slots in your team either. Only reason I can see to actually make significant use of AW Berna's "rogue = token" ability is if you have multiples of Berna. Other rogues will likely die quickly against anything that you'd actually need tokens instead of duelists to slow down, while taking up deployment slots and not being able to use their assassination chance immediately. Of course, I believe it still applies to AW Berna herself, so there's that at least (if evasion and assassination RNG let you down). Would be nice if Berna's AW ability applied to Ninjas as well, they're also sneaky people of the night XD
Lol at the idea of a Berna Clone Assassin Squad