Many people would choose Mirroring Techniques, a skill that allows a Combat Artisan to copy the control commands for one Flexible Construct to another, letting them control multiple Flexible Constructs with the 'CPU' usage it takes to control a single one.
Of course, there is some loss in the edge algorithms, so this technique is not without its flaws. The more Flexible Constructs being controlled, the greater the meaningless chaotic loss, and generally, exceeding three would be counterproductive.
Moreover, this skill often applies only to similar types of Flexible Constructs.
Both of these skills are what's known as Ether Knowledge, which is the knowledge specific to certain schools that other schools generally wouldn't choose. The term 'big' often refers to node skills—because they are relatively profound, they usually require consuming more experience to learn and master.
Fang Hong chose the latter according to his own thoughts: