Harken 4:1 cascaded outhaul, perfect for the C22:dance::
http://www.harken.com/rigtips/outhaul.php
Vang, 4:1. Catalina Direct has kits:dance:.
Boom downhaul: at least 2:1, 3:1 better. 4:1 is best if you run lines aft - just a little more friction in the extra blocks.
Cunningham (optional if not racing) 4:1. Catalina Direct sells a 2:1 kit - IMHO - that is a joke

. The C'Ham exists to pull MORE luff tension than the boom downhaul. The C'Ham is optional because you can always pull the boom down further than class racing rules allow if not racing.
Harken has pictures for Vang and C'Ham as well. The boom downhaul is more specific to boats like the C22 where the boom slides up and down. Otherwise you set luff tension with a ($$$:cry

halyard winch.
OC