Found this while screwing around.
MATERIALS: 6 placeholders, AND something for the placeholders to shoot at, something that can't shoot back. make sure you enable overkill and set firestate to hold fire on all of the placeholders
STEP 1: have 3 placeholders shoot at the enemy.
STEP 2: wait until the placeholders are at 50% reload
STEP 3: have the other 3 placeholders shoot at the enemy.
STEP 4: set all the placeholders to fire at will and watch them ascend into heaven, or at least the maximum height for black holes.
Depending on your luck, it can take anywhere from 2 to 8 minutes for them to reach max hieght, which is around 3 times the height lobster reach with their lob.