i typically run four riggers- the two outside riggers higher in the water column (chart, purples, frogs), 1 rigger deeper (usually a mupped rig), and the probe rigger the deepest (mag nbk, echip and fly)
1 10 core centered out back
wire rods- 1 off each side (typically flasher/flies)
obviouslly conditions will dictate but this seems to be a very "comfortable" spread for me.