Tips for fighting Gundabad
So, I'm playing woodland elves, and I've taken out Dol Guldur, and have made significant headway into clearing out Rhurim. I've had to move Legolas away from the Rhurim campaign to help Gondor but that's a separate problem. My current problem is that Thranduil has taken the settlement next to Dain's Hall, but I can't advance since they keep sending two armies at me every two turns.
They're tunnel slaves and goblin mercs (trash) but they's still 8,000 of them and 1,500 of me, and the battles leave my forces too depleated to do anything about it. My economy is making about 3k per turn, should I just throw all my money into 20 stack armies and try to steam roll or is there something obvious this Noob is missing?
Note, I only have 2 armies at the moment and I'm in turn 80(ish). Have I just majorly screwed up on that front?