Using squads as artillery

Back in world war 1 at vimmy ridge the canadians used the minigun as indirect fire artillery to fill in the gaps in the regular artillery baradge and thus createing a wall of lead that crept up the mountianside to sweep the germans out of their entrenched positions . to adapt it to paint ball I was thinking of takeing a squad of 4 or 5 and all long balling at the same target or pointing up higher than a 45 degree angle and creating a rain of paint from above and esentialy flanking the enemy from above.
the problem with this strategy is that a tight group of paintballers create a large target that the enemy will probly be able to hit. to aleviate this problem it would be best if the sudo artillery squad was behind a obstical with an attached security element and a forward observer preferably with radio contact to the artillery squad. the artillery squad would then all hold their guns at the same angle and fire a test group ( about 5 balls per person) The observer would spot this call for an adjustment of fire Eg. down 1degree left 1degree. when the unit gets more practice they can do a sweeping artillery barage up and down dug in defenders then the only protection from your forces the enemy has is heavy tree canopy or buildings with a real roof . that would clump them together and create and easyer target for your main forces to engage flank suround and destroy.

part 2 after some testing

some of the other problems with this is the need for a huge field and the inacuracy of the paintball
useing more people in your squad is one way of makeing up for the inacuracy.
also when you are holding your paintball marker at such a high angle it tends to not want to feed properly being gravity fed.
also the forward observer would have a very hard time seeing and adjusting the fire especialy in a big fire fight where there would be paint flying everywhere anyways and the sound of falling paint would be very hard to distinguish.