A Massacre.

Since the holes were constantly being created, the procession became stalled. They became a literal sitting target for the invaders to fire at. They couldn't move or do anything, so they could only watch as their defensive tactic came undone. 

Fortunately, or maybe unfortunately, they didn't have to wait too long. The Supreme Tyrants were 64,000 in number, and they needed about 100,000 cycles to eliminate half of their numbers. Each cycle was a second, so high heaven needed just 28 hours to destroy 50% of the structural integrity of the barrier. 

But by that time, the resources available for the barrier had become too few to block a concentrated attack at a single spot. So the Origin gods of high heaven didn't need to scheme for vulnerabilities anymore. They just targeted each Supreme Tyrant in turn and turned them to ashes.