Cool, I love these threads!
Looks like you have a quite advanced army - but the fact that you have yet to capture MI seems to suggest you're turtling. That's my preferred way of playing too, although I think I'd allow myself to take MI pretty early to avoid this exact scenario. Nevertheless, it sounds fun.
Is Rhun at war with Adunabar? Looks like they could be your biggest friend if so.
Great to hear that Adunabar went Cultic; it's more fun that way, I think, especially if they're training some more useful units like Uruks.
Of course, the longer you fight with Adunabar in Ithilien, the longer you're going to have to fight with Harad. Actually, I'm surprised that Harad hasn't attacked you in Emyn Arnen yet (maybe they have). Usually I have to distract Harad with a 2 or 3 pronged approach: 1 army parked on the bridge south of Ithilien to absorb their endless stacks; a second army working down the Harondor coast like you've done - and, if it can be spared, a 3rd army to send by ship wayyyy down the coast, to take Annumbar, then Umbar, and so on. By that point you'll begin to see Harad's constant attacks drop off ... slightly.
Anyway, cool report; keep us posted!
