Congratulations on making it this far. You suffered through so many Pinatas that you get 2 extra Pinatas to fire at once. The amount of projectiles and damage per projectile are reduced but tripling the amount of pinatas leads to a lot more total projectiles flying around. Before the Pinatas explode the 3 flares have to land first. If you fire at a 45 degree angle the flares will land very close together and thus the general spread isn't as bad.