The halyard is the only place of the three that I do tapered. I use Robline Dingy Control for spin halyards, it's core and cover where it cleats, just cover on the retrieval side, and just 3mm dyneema above the cleat. It runs through that tiny block at the top really well.

I like using just a single braid for main and spin sheets. I don't bother tapering the main anymore. The lines are really good now days. For the spinnaker sheet I just jab 3mm dyneema through a single braid and splice a tail into it that I tie to the spinnaker clew.