I would fully evolve all of your lil dragons. They're just amazing.
As for an actual team. I would either go red, green or dragon spam. You have Ares, who's a really good red leader. Most of the red stuff is farmable, so you could try farming a titan and a mystic fire knight.
As for green, you have a capable leader in Brachys and high lander. You could evolve both of them and get add the green lil dragon to your team.
As for dragon spam, just evolve all of your lil dragons and your dark dragon knight, choose the lil dragon who's resists fit the dungeon as your leader, find an Ancient Dragon Knight friend, and steam roll everything. It works best if you have an Ancient Dragon Knight, but it still works if you don't have one.