at work right now , so ill give a more detailed answer in a couple hours.

Artilery officers are not that important to have and are a bit of a niche. The only mission where you'd actually use an artilery officers is one of the DC dailies , but you can do that with a percy (silver artilery) , and that depends on the strategy you use to beat said daily , because there are plenty of straegies that don't use them

You could get her if you have the extra dc , but if you don't i wouldn't call it a loss hoonestly


As for which units you should prioritize ...well , seeing that your roster is not that big , going by highest to lowest rarity is not a mistake.

Ill give more details later