T200 has too much current draw. Do I need to change wires or replace battery?

you need an esc that supports it.

I have the Basic ESC from blue robotics, I don’t think it supports it.

But won’t limiting the pwm values to the ESC like you mentioned, also limit current draw?

yes that should limit the current also.

After limiting pwm. It will also use the limited values on autopilot?