Whoa....this is very unique, and very well done. If you aren't working by yourself or with a team on a VN....
I don't want to tell anyone what they 'should' do...suffice to say, any team would be lucky to have this kind of art in their project.
Again, very original ^^
The firebird (I know it's not a firebird) is my favorite.
It makes sense that you try to focus on the squishy mages at the back of the party first, right? If the mage can out-DPS the enemy DPS before the latter can kill the tank in front, the fight becomes boring.