Stock harness to stand alone rebuild

[softballnrd27]

I am at the point in my harness rebuild where I need to wire all the external "stand-alone" parts of the harness. As most of you know I need to supply keyed 12v to 8 injectors, 2 coil banks, 2 O2 sensors, MAF, and 2 PCM connections. I have a 4 fuse block that will have 1 constant 12v and 3 keyed 12v fuses. I was thinking of running 1 fuse for the 8 injectors, 1 fuse with the MAF, O2 and Coils and then the last fuse for the 2 PCM feeds. Does that sound like a good plan or should I get another 4 fuse fuse block and break it down even more?