I was using a House rule at the time that allowed people with Far shot to double the range of sneak attack and point blank shot so the range was 60ft.
The party was about 8th level. we had a Duelist, a Ranger, and a sorcercer. Everyone took cover exceot the duelisyt who ran to a wagon, jumoped on top of the wagon and tried to jump to the top of the roof. He fumbled that roll and broke his leg, but had great cover against the side of the building. TH Ranger tried to answer with bow fire but all he did was draw their attention and he got pin cusioned. THe sorcerer tried to launch a fireball, but a roguew had readied an attack against him and he gor crited and went down. Sneak attack was applied because the sorcerer was unaware of the enemy. So, I then had the assassins run away as the local gaurd showed up. Had to do that or else I would have killed the party.