Greyjoy Mill v1

Add more raiders, including Euron's Enforcers (DB), who quickly become unblockable. Also include Training Vessel (TIoR), which, when added on top of an intimidate character add an extra 1-4 discarded cards each. This can be followed up with We Take Westeros! (DB), and supported with Kraken Tattoo (CoS) on your bloodthirsty crew. All told, you could easily discard 20-30 cards in a single turn.
You also might consider using Euron's Mongrel (ASoSilence) for some board control so you're doing something with those discards beside the 3 power a turn for corpse lake and take care of cards already played.
You also have very little gold production or cost reduction, so to speed up getting your stuff out (and further power the enforcers), try using Ambitious Oarsman (RoR).

Thanks for the advice. Three of the cards you mentioned I don't have but I plan on buying those chapter packs soon. Could you possibly suggest what I should take out to put those cards in. I also plan on buying KIngs of the Sea again because when I bought it FFG's was not doing the three copies thing.

At a glance, I'd get rid of Cragorn (his best ability is choke, and if you're going to discard fast enough, choking shouldn't matter, especially not a light choke), Godswood Attendant, a copy of Asha, a copy of Theon (you don't want him to survive anyway), Wex (undefendeds can come from massive intimidating characters), and Ice Fisherman (same reason as Cragorn). The Support of Saltcliffes are nice, but should be extraneous if you put in the Kraken Tattoos.
River Raid isn't really that useful, and Raiding the Reach can be replaced handily with We Take Westeros. I'm not a big fan of Flea Bottom unless you're playing a really expensive deck, and with just a handful of spikey cost characters, you can get around it with high gold plots, and if you're discarding fast enough, Frostfang peaks is kinda redundant.