Second Single: On & On, make some sort of clubbing PV, or something with flashy neon lights and cool sneakers like the ones she wore in the promo pic :p. I dunno something cool that'd appeal to a clubbing audience while keeping it Utada.
Third Single: One of the mid-tempo ballads (FYI, Apple & Cinnamon, This One) to appeal to the masses and break through

She'd need a mainstream PV with her walking through a rainy street and flirting with guys with a sad look upon her face (I dunno if that makes sense)
what an ingenious master plan.. hope it works

she could even make a fourth single Dirty Desire.
not like that'll ever happen