I am not a fan of using any chrono mons in fl after what happened to XYZ. (Aethereon ftw - another underrated mythic).
I’ve been using it with Gieh and Zomboid in the mid,
last rank with Asmodia + Shiny Lava in some LINK shadow.
Chrono killer is not enough to kill it. The main issue is the high tu on the double poison eater but with a little help of GT mon, you can line it up to eat through half of enemy’s team. Unlimited 42tu Radioactive Fallout is also a good help for other sweepers to finish off tanky myths.