If your battery is a LiPo, my understanding is that you pretty much need a master fuse. Everything powered from it must be on a fused circuit, i.e. including the power light, and the power light shouldn't be on a separate fuse because then that fuse blowing would mean the light is off on an active robot.

The thing to keep in mind is that fuses are mainly intended to stop wiring or battery fires. I would personally just use one master fuse. The individual fuses as shown in the diagram wouldn't add much. Stalled motors won't draw enough current to blow them (which is good anyway), so they'd only blow if one of ESCs failed short (which should be quite unlikely). With both drive ESCs on the same fuse, either one failing would take out your drive and lead to a loss. Basically they'd only help if weapon ESC failed short (by allowing you to continue to drive), which I think is not that likely. Meanwhile, they add weight and potential failure points.