you have to be with the person you're "paired" with to get the triple experience.
it doesn't seem to apply resting xp to these gains (it never decreases), but you still accumulate it. this actually isn't a horrible thing since once i hit 60 i'll need the resting to hit 61 fast
i was trying to write some clever integral here to express how sad it is when i'm enjoying my "time off" leveling as many characters at least to 60 as i can