Drawing faster, or a faster painting technique doesn't necessary lead to a better productivity and good ratio of artworks I love compared to my time spent on them with my stylus in hand. But I did the mistake of believing this, stubbornly, and for long.
However, a boring technique, even slower, but one you can split in steps, trust, and predict, eliminates many bottlenecks: freezing, endless redos and stress. This leads to a better productivity and peace of mind.