I mean to be fair think outside the box.
If you were MUNCH and SINTM:
You run out of room to grow. You have to start eating somewhere. Jheeeez is falling inactive, while having 0 success defending or attacking Cicada. You have two choices.
1. Let Cicada eat all the food out growing you
2. Eat with Cicada on food that is still fighting but slowly dying.
The clear answer is what we use to call a "gang bang" however I wouldn't say its not 1v1. There is little to no coordination between the tribes. Just 1 tribe trying to win their war, with 2 other tribes trying to eat and keep up with growth.