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Man, I can't seem to beat 79 and 80 (Valhalla and Foccacia) 
If anyone has a general strat that they used, I'd be interested to hear it.

Edit: Thanks for the responses guys. Both completed now, 79 was a balancing act where I tried to hold off red at the choke between the hedges where his eastern base originally was. Also needed a castle at the starting point to keep myself alive early game as I gathered resources slowly. 
80 felt like a puzzle where there's a great 1st move that can cut almost straight up to bankrupt the knights, with a diagonal cut to keep the western side with <20 gold so they can't make a pike. From there it was enemy income management.

Very fun, if frustrating maps.