What is your operating voltage? In giants I typically use 7 - 8 VDC (2S LiPO) and then use HV servos that give me the torque I need at say 6 VDC.

Digital servos are power hungry. They can all be moving at the same time. I calculate how much current the entire system needs and verify that the power system can supply that + 50%.

In Giants I stick with HD servo leads and power wiring. Also, every servo has its own power supply line.

May be a bit over kill. But when we are using a plane where there are spectators stuck in their chairs, we can not have a large plane land in their lap(s).