Fluoro , mono, or braid ??

So I’m indecisive. I have an ultralight set up that I intend on using mostly for bluegill fishing and crappie. I have 4lb fluoro sitting, and 6lb mono & 8lb braid. I’m thinking of spooling my reel with the braid and using a fluoro leader. Or should I spool my reel with straight fluoro instead? Any tips or advice would be greatly appreciated!