Count the Matchsticks
Python 2, 97 bytes + 237 matches = 334



lambda w:sum(map(('1ir'*2+'7lnu'*3+'4cfhjoy'*4+'235bdegpqsxz'*5+'069a'*6+'8'*7).count,w.lower()))


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This works by generating a string where each buildable character appears the same amount of matchsticks required to build that character