@panShlyaptor
The optimal rogue multiclass is to have as many levels of rogue as possible, it's one the classes that benefits very heavily with levels alone. I am also really unhappy about hearing that multiclassing will be included despite being a return to source type of person an I am very worried about how it is going to be implemented and how it is going to desolate the combat, and the response to how powerful it is.
I liked playing multiclass Arcane Trickster\Blade Singer. And I played with person, who built fighter\ rogue. I like multiclass in d&d 5 only for choice, that it gives while creating your character. I hope, on release we will have different difficulties, so optimizers can play multiclass builds, like sorlock, sorcadin, 2 level fighter dips and other on very hard. Still, it is not MMO game, so balance is not a great issue