Why was Noah able to fight solid stage cultivators even if his dantian was still in the gaseous stage?
There were many reasons.
The most influential ones were his aptitude and the level of his mental sphere.
Noah had always been advantaged when it came to the sea of consciousness, the level of his mind didn't match at all the normal level that gaseous stage cultivators would have, many of them were still rank 2 mages after all.
Also, his element expressed more power than the others, the huge depletion of mental energy and "Breath" was a normal consequence to those more powerful effects.
Then, there was the variety of spells that he had and the rank 3 Demonic swords in the upper tier.
Noah had profited greatly from the Inheritance, especially when it came to his defensive methods: Heilong, the Ethereal form spell, and the Black hole spell were amazing defensive methods that Noah could apply for any different threat, it could be even said that his defense had no flaws now!