Cleanse after the polish - I would add in a decon. stage though. AG Cleanse will remove the oils left by the polish ready for the wax, you'll see no benefit of using it before the polish which would remove the base left by the cleanse.
I tend to; snow foam, rinse, wash, rinse, clay, decontaminate (Wolfs Decon/Iron X/etc), rinse, dry, polish, cleanse, wax.