Looks like DUB is pretty reasonable too at about £3500 on AA. It gives you the AA non-stop going over, but for some reason it's requiring a connection on the return AA to EI.
You can do that as an open jaw DUB-PHL- either AMS or CDG for ~£3700, which allows you to leave PHL later, meaning you could probably leave on the 2nd vs. the 3rd. I don't see any likelihood of being home at 5pm on the 3rd unless you take an evening flight out of PHL on the 2nd.