Voadam said:If he was invisible to start and ambushed someone they would not know where it is coming from and would react less well than otherwise, but no skirmish damage unless moving.
He doesn't have to hide. He doesn't have to catch his opponent off balance. His opponent can be fully focused on tracking him in an open field and be aware of where he is with no distractions. All he has to do to get more damage is move and then blast with his eldritch blast from 60 feet away.
I think my description is more accurate.
The scout uses movement to find the best target area on his foe and thus gets in a single "good" shot (melee or ranged doesn't matter). The asumption would be that there is a sweat spot on any target that can be hit to do more damage. So the scout moves (to find the sweat spot) and attacks. The foe reacts, the scout moves to again find the sweat spot (which may have changed but the scout is trained in being able to spot it) and attacks again. Continue.
Hmm the skirmish has a range limit of 30 ft just like a rouge's sneak attack so a 60 ft eldritch blast is just right out of the equation.