The act of dividing light to create shadow swords from the void is a divine movement, a Sword Dao Divine Power. By fusion with treasures that contain Geng Metal Qi, such as Geng Essence, one can greatly enhance the power of Divine Skills.
Ordinary cultivators often focus on cultivating only two or three techniques, not only because of the difficulty in mastering the techniques which requires a substantial amount of time but also because, for mid-high techniques, gathering various compatible treasures can greatly boost the power of these techniques.
Specializing in two or three techniques.
Whether it's understanding the techniques or gathering treasures to enhance their power, both are most appropriate.