The point is.. You attack for three ticks with one ship type in one group, it's going to be a solid three ticks. Now if you attack for three ticks using say.. A 2 ETA ship, a 5 ETA ship, and a 7 ETA ship.. That comes out to a 10 tick attack total, starting two ticks after you launched it. Can you say multiple divebombings? The advantage is being able to hammer your enemy almost nonstop. The disadvantage is the enemy and their group being able to counterattack and defend over a larger period. Who's going to miss a 10 tick attack and not defend when the opportunity is right?