Well, 22d12 + 2 is 80 BP itself. Each dice is 3 BP, so (3 * 22) BP, plus 3 die size upgrades (3 * 4), plus 2. So it's no more expensive than your scaling dice attack.
However, you can outdo me easily. Just buy 5 fractions instead of six.
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"As the size of an explosion increases, the number of social situations it is incapable of solving approaches zero." -Vaarsuvius, Order of the Stick