The Friendship of Saruman 2.0
This is a thematic fellowship exploring the Rohan trait and the Isengard trait, built for the Experimental Deckbuilding series at my blog The White Tower.
Gríma and the other Isengard allies (Orthanc Guard most notably among them) key off of the Doomed keyword to speed up the deck's start and start getting Gandalf, Saruman, and Treebeard into play as needed, using Galadriel to offset the threat cost of doing so. On the other side of the table, Fastred counters the threat raise of the other deck, and Éomer takes advantage of sending enemies back to the staging area, also using his ability to clear Guarded player attachments without needing to engage and defend the enemies they are attached to. If the Guarded cards are attached to locations instead, Rohan allies recycled by Gúthwinë can deal with them.
Detailed strategy descriptions can be found in the individual decklists.