Lolix nailed it, pretty much. Your team is already solid, so AW from here on is more or less bonus/niche.

That said, Bernice is a cheaper alternative to Deine, Imelia's one of the best duelists we have, Belinda is solid and Claudia is a decent option since you have no other princesses (for magic damage, actually her skill allows True Damage). I'll even tip my hat to Rita since her AW buffs her damage considerably (keep in mind, she's a niche unit for avoiding nasty ranged attackers).

The above paragraph depends on your current resources. If you're swimming in gold and AW fodder, go ahead and AW some of them. If you're even remotely tight, I'd only AW Imelia/Claudia for now, and save the rest for later.


Side Question: Does Rita's skill allow her to avoid that S.O.B. dragon elder's attacks? Because it's not a traditional AOE but more of a "I hit everyone I can reach 'cuz my hacks" jerk move.