Ended up being pretty straight-forward on my second try with a 1/5/2 Lv172 Nova. As everyone else said, once you deny yellow (and to a lesser extent red), there's literally nothing else to it.
The token gave me a red Elektra, making her 5/3/3, meaning that I'll have her fully covered when Daredevil hits Lv265 or 3* Elektra starts to catch up (she's currently at 5 covers for me), which is nice.