I agree with Witchkingx5 that you should add more cards--the cycling happens with
Mallorn-trees and Arwen herself.
I asked about using
Gimli, DoE with
Echo of Luthien in a previous thread and the consensus was his ability was too costly for the service it provided. Just max out on
Mallorn-trees if you're concerned about not drawing them early enough.
I run my
Echo of Luthien with a
Gandalf, MoW to help lose initiative but with all the discarding you plan to do , I don't see that as an issue.
I see swarm as a real danger for you (splash Gimli and Sam are weak fighters as well as your Ring-bearer. Arwen and
Cirdan will take any minion but they can't skirmish for their comrades.