Training 200+ After Nexon's Party EXP Changes?

My Aran can clear that entire map with two attacks. I one-shot those golems consistently and I still can't keep up with the spawn in that map. As soon as my combo tempest wipes the map, there are already 20 more spawning. I have no idea what it is about that map, but the spawn time is low, and the numbers are massive.

You are most likely experiencing Kanna Residue™. Once a Kanna has been on the map, the spawn time reduction has a chance of staying in effect after the Kanna goes away. The number of mobs goes down to normal, but the 2 second spawn time remains.