Focus Question

[Marcusito]

Can you stack Focus?  For example can you focus twice with the same model to get a potential double positive on the attack duel and damage flip?

Looking at the Doppleganger.  Can you focus twice to have +2 focus with your (1) actions then use the zero action to borrow an attack from A model with +2 focus?

[Nikodemus]

Any condition with +X in it stacks (small rulebook page 61).

[Dogmantra]

To add to Nikodemus's answer, any condition with a +X in its name does stack. Any numerical value with + is the part that stacks, while numerical values without do not (so in Armour +1 for example, the +1 damage reduction stacks but the minimum damage 1 does not). and also stack in this same way, you don't need a + in front of them.

[WWHSD]

And to keep piling on...

You can stack up the Focused condition but ends at the end of the turn and when you use it you use all of it at once.

Example: Brass Arachnid gives Joss Reactivate. Joss uses his regular activation to focus twice, resulting in the Focus +2 condition. When he reactivates he makes two attacks. He can end the condition when declaring either of the attack actions and he receives [+][+] to that attack's duel and damage flips. He doesn't have the option to take a single [+] to each of the two attacks that he takes during his reactivation activation.