Killed him on the third try, losing 4 Gremlins and an Ogre. But only because the weak units were messing things up.
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And I think the maneuver was correct (of course, if the battle had been easier). I just shouldn't have built a Castle; then the Nagas would have been able to position themselves properly in the Citadel, and we would have had more money. + 2 Giants would have been a big help.
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