actually iits possible to 3 star last 2 maps without fully aw teams. Hell u can do it with just cc-ed stuff , assuming u have the right units for them. For example , i've used 3 AW units for the last map and those were bernice and iris and spica (spica being aw isnt that important) . Other then that i used solano and 3 max level cc-ed gold + mages (odette ,cyrus and barbastrof) , besides that , i've also had nanaly. ALl in all i had pretty much insane dps.
But it can be done even without nanaly. you would still require 3 mages tho. take a look : https://www.youtube.com/watch?v=tjb4BoWDCb4
good duelists (i used imelia , claudia and AW celia) , and a lot more beefy stuff to use as rods (i used stuff like condrad and mortimer since they can take 2 hits from the king before i have to recall them) , maybe an odette. If u have nanaly and elizabeth , u won't even need 3 duelists. 2 will be enough , and u can use the rest as rods.