Need Attack Help

I am looking to accomplish the battleship type maps attack.. This is an attack that will hit multiple targets, always the same number of targets or if there are not multiple targets around it will hit one target multiple times, while moving and be very reliable on the number of times it hits each attack period.

I have tried barrage and discovered that it does not attack while moving.

I have tried pheonix fire and have been unable to get it to attack the same number of targets each time reliably, no matter which way i used it. (adding 6 copies of the ability or spawning 6 units with it, for example)

I have also tried getting 6 random targets within range of my 'shooter' unit and then applying damage with the 'unit - damage' normal trigger. I then applied advanced triggers from WEU to the map and attempted to use the 'Advanced - Special Effect Create Missle To/From' trigger. The only problem with this way of doing it, the missles are not coming from the 'shooter''s position as well as something like pheonix fire... in fact, they're lagging behind like a whole second.. so it looks like they're being shot out of thin air.

I really appretiate any help on this...