The dullness of the environment gave Noah a lot of time to think about his current state and the heights that he could still achieve. His initial ideas about potential techniques evolved, shattered, improved, separated, and took directions he didn't initially predict.
Noah didn't need to create final techniques, not yet, at least. His focus went on his general battle style and the power it could express if he deployed his aspects correctly, especially when it came to time and space.
Then, Noah had to mix them with his companions. The times when he had to fear for their well-being were over. Night and the others could stand proudly at his side and help in most battles, depending on the situation.