While I agree there is a generic AI that plays almost all levels, Level 3's AI seems a bit different. By my observation, it has some specific strategy of using the pre-designed decks. e.g. In the
duo: BB on Gnome Rider has the greatest priority instead of CC, Earth Nymphs
refuses to use its ability on enemy creatures and Pulvy would only destroy permanents randomly even if there is sufficient quanta. Another example is Eternity, which again the AI won't use its ability as CC when there is enough quanta.