The Lightning Titan was fighting three True Gods at the same time. His power had been restricted the moment he emerged on Milarn but that didn't mean he lost his experience and the proficiency of his techniques.
He was still the same powerhouse as before, just that his output had been restricted quite a bit. The strength of his Divinity and the Lightning Storm that was attached to it was also severely restricted.
However, that didn't make a big difference to the Lightning Titan whose entire upper body was clad in both crimson lightning and the lightning storm. With his Divinity unleashed as much as he could possibly do while being restricted, he was fighting against three True Gods. They were pushed back and unable to fight against the tremendous power of the Lightning Titan properly.
Yet, just when it looked like the Lightning Titan was about to finish them off, two much smaller figures that were also shrouded in bolts of lightning emerged next to the True Gods.