"Oh Shit!" Zim said inside the cockpit as he realized his weapon had been stopped dead in its tracks. At first he thought that the beast's neck was just strong enough to stop it, it took an extra moment to realize that the beast's imposing forearm had reached up, reacting in time to be able to stop the shaft in its flow. These were not the same type of Cruxi that they had fought before. These guys were... smarter, stronger, and apparently faster, too. Zim had to break free, and quick. He raised the Wave Surger and released the charge directly into the chest of the beast. Its dark, beady, alien eyes stared into the optical cameras, and through them, directly into Zim as he stared back through the HUD. They were the last thing to dissolve into the white hot heat of Blackstar's released rage. That, and the hand that had grabbed the shaft of Blackstar's Scythe.

Rage, because as the beast disappeared before him, rage was the only thing left behind of their existence. The cold contempt that the Cruxi held for him was replaced only by the hot heat of Zim's hatred for the Cruxi. Zim turned after the beam was released to see what happened to the other two beasts, he saw as Redeemer joined in the assault and assisted in putting the second beast down, he saw as the third leaped into the air, only to be swatted out of the sky by Jaeger's well timed attack, he still managed to get a hand on Ojo in his decent, but to Zim, it looked like that threat was over. His sensors indicated an incoming attack and he spun his werk  to face the threat, saw the glowing orb flying towards him through the air as it suddenly changed directions and slammed into the cityscape. When the glow of the resulting anti-mater explosion faded away Zim saw the huge empty crater. 

Zim was reminded of where he was at again, his heart skipped a beat, his pulse quickened. A shot of panicked adrenaline raced its way through Zim's system. He stood there for a moment as the Orbital Deflectors did their job and kept Blackstar in one piece. He scanned the landscape, once again trying to remember where the shelters were at. To Zim, it was as if time slowed down around him as his frantic mind searched for the answers, the battle unrolling slowly around him. If he had the state of mind to notice, he would have seen the second antimatter blast released, he would have seen Kreig entering the fray in an unceremonious flail through the air, but he was too focused on the wrong thing. As the orbital deflectors were overworked and some residual plasma made it through the sensor alert to the damage that the frame had received broke through the panic and brought Zim back into the moment. Zim's focus panned in and brought the focus back to the cockpit of the werk, the background Zooming back into the background, back where it belonged, allowing the foreground to do its job. Blackstar reached forward to removed the dead hand from the shaft of his weapon, allowing it to drop dead to the ground with a surprisingly heavy thud.

The rage fueled adrenaline pushed Zim to ignore the second crater that had opened, his sensors registered the existance of Kreig at the far end of the field, but Zim didn't have time to worry about that. First, there were Cruxi to die. "Engaging Cruxi in J8," Zim said, his voice steely, calm, and focused. Zim pushed blackstar to maneuver around the cover that the Cruxi CWM squads had taken by first moving to J7 before spinning around and coming back down behind the squad in J8. The high gravity and the high speeds caused the thrusters to work harder than normal, Zim's normal suit struggled to maintain comfortable conditions for the pilot as he spun in a tight circle as he turned to face his foes. He and Blackstar unleashed a scream along with the thrusters as Zim pushed his luck and his speed flying directly into the middle of the CWM squad he had targeted. He went after the unit farthest from himself first. A horizontal slash through the mid-section, turning him to face the next Cruxi. He lowered the head of the scythe almost to the ground and jumped towards the next foe, bringing the scythe up in a verticle slash through the middle of the foe. With the scythe in the air, Zim spun in place and faced the third unit and continued the motion of the blade down through the middle of the last CWM.

TLDR: Zim fights through a panic attack and moves on J8 via J7 and takes on all three CWM at once.