Cyntha only landed a single shot in her latest volley, but it was a good one. The fuel line beside the driver of the lead buggy sprang a wild leak, dousing the driver in flammable fluid. He began swerving, trying to block the flow with one hand and steer with the other. A fine mist from the broken line drove the gunner's last burst skyward, so high it even missed the shuttle behind your Chimera.
Before they could recover the situation, the heavy Bolter opened up, and everyone within eyesight was reminded of the glory of the Emperor. The first round struck the big shoota on the back of the leaking warbuggy, triggering a detonation of the round in the chamber. The conflagration of that small detonation was sufficient to catch all the flammable liquids spewing everywhere. Those with a forward view were treated to quite the spectacle. Fire seemed to alight in midair from seemingly nothing, then rain down upon the poor driver. Then the rest of the ammunition caught. The warbuggy exploded, and the poor boyz on it were too distracted by the previous leak to even attempt a dodge. The explosion was large enough to throw jagged shrapnel at the others, but the bits were too small to do any real damage.
And that was just the first Bolter round. Wilhelm shifted to the next buggy and delivered two solid strikes. The warbuggy emerged from the small puff of smoke with a sizable hole in the hood and a flat tire that kept rolling like nothing had happened.
At about the same time, Tiberius unloaded the stubber on the unsuspecting trio on the Chimera's right flank. The runtherd took a slug to the chest, stumbled, and took a second well-aimed round to the dome. Green and gray matter spattered everywhere and the headless carcass toppled over backward with the force. Tiberius's third round caught a gretchin at the hip, severing its leg and spilling its entrails on the tarmac. Two down.
And before the last gretchin could fully comprehend the terrible choices it had made, Ralley introduced it to the inexorable force of an Imperial Chimera. The Chimera hooked a hard right, grinding up plasticrete beneath its treads, then spun a hard one-eighty. The gretchin's foot was caught by a tread, ground to green paste, and the rest of him was flattened by the Chimera's ceramite belly.
The Chimera was once more facing the approaching pair of warbuggies, still 60m out. On its left were a pair of leaderless gretchin 12m away. The latter dashed across the open runway and leaped for the Chimera's top. One headbutted the skirting and fell on his ass but the other successfully parkoured his way onto the vehicle. The only way to engage them now was to exit out the rear or top hatches (rear will require a full action, top hatch will require a half action but Cyntha will need to move).
The damaged warbuggy gave a final salvo, which again missed entirely thanks to the wild maneuvers of Operator Ralley. Then the two boyz grabbed their choppas and launched themselves at the Chimera. One flopped on his belly at the front edge of the weaponized transport, legs dangling in front of the heavy Bolter and his upper half in full view of the Stubber. The second concussed himself with the barrel of the Multi-Laser. But he was still an ork, and he maintained his footing and consciousness.
The final buggy came barreling by, hoping to strike some weak point in the side or rear armor. The Chimera endured two full barrages from the big shoota with naught but scratches. Then the buggy was past, 6m behind the Chimera and still gaining distance.
Conditions: -10 to all shots from the Chimera next round (ramming speed). The dangling orkboy is considered point-blank (+30) for the Bolter and Stubber. The ork on the barrel and the successful gretchin are also point-blank for the Stubber. The Multi-Laser is too long to aim at any of them. The gretchin on the ground is out of field of fire for all weapons and must be engaged externally.