Crosswire
I usually do Crosswire. 20 points for completing all three puzzles. Takes me 4-5 minutes tops. Some topics I know, some I just try to match up each item one at a time. Very easy in my mind. I don't know why you would skip the last puzzle and lose the 7 points. The only thing that makes it harder is that there are two topics that don't match and if you choose one, your previous matches are wiped out, but you don't lose.