User blog comment:SaiScott95/SaiScott95's Armorknight Deck (Danger World)/@comment-24350958-20140121201954/@comment-1755882-20140121202332

Yeah, basic theory tells us that Penetrate Items beat out Penetrate Monsters just based on them being much harder to counter or remove.

Gonna rope Scott into helping me give Penetrate Monsters a proper test run, but for now, it can be assumed that they're not worth it.