>>529673618
If anyone else has a problem with getting the tie version of this achievement, you can just go to the lowest level of some of the calyxes that spit out four opponents and have them both one-shot two enemies each. They should be the only ones on the team to make sure other characters don't get in the way. If you see an odd number of enemies, just run and try another calyx. I had them tie on Belobog's character exp calyx.