Throne hall fight

You are leading the last fight for the throne hall! Place the warriors to the battlefield, and try to not give an upgrade to your enemy, how many points can you score? Basically, this is a triple-town mechanics but with an opponent. Your opponent has black items. Your items are in different colors. You place an item on the field and your enemy does the same thing. If you have a three similar items nearby, they are merging into one better item. If your enemy merges three items you lose the score. You win if your score is more than zero.