My buddy, Chucky, was a big time Spider Rigger .... 6 or 8 rods - 14 or 16ft - 3/4oz weights - 2ft leader with 1/8oz jighead & plastic body & tipped with a minnow (usually a large minnow). Single jig per line.
Had a guide member on here once say he used the same jig/plastic/minnow setup AND tipped the hook with a Crappie Nibble
Everybody has their own ideas as to how to Spider Rig & what to use ... so experiment with what you have, before getting too many "over the top" ideas on what you "have to have/use". It's not for everybody, and you don't need to start out with 8 long rods to see if it's right for you. I tried it and found it to be a bit too "slow" for my tastes, so I took the 3 long rods I had and use them to Push jigs/cranks, sometimes adding a shorter 4th rod when fishing an area I'm familiar with as far as the depth and bottom contour.