On my hit of Callisto things started to go back when I got near the core. My smokes were too low and as result I had to waste gbe to cover – out of fear the the zookas would spread (which they did, yay new update!).
Note – Machina has the same lines as Callisto.
I then proceeded to miss my shock of the flame throwers (trying to avoid shocking all my zookas) and then I was short GBE for a fifth shock or critter. Messy.
The ending was amazing though!