no need to put anything after poli-seal imo...until the protection disappears. but that's me. i don't think it will hurt anything, but i think with opti-seal, because it's solvent-based, it will basically dissolve the poli-seal protection and re-distribute it and/or exchange for the opti-seal. i guess if you used opti-seal as a drying aid during maintenance washes, it will reboot the protection. but purposely putting opti-seal on right after using poli-seal seems silly.
with OCW, i think that it will not do that but the poli-seal will prevent a good substrate for the OCW to stick to so anything you gain w/ OCW will disappear soon.
but my opinion is why add something to poli-seal when you are doing the AIO to cut out the last step already!