The ones I am having trouble with are.
Assemble Daybreak (What is Daybreak?)
Find the Gemini Zodiac Chamber and take its treasure (No idea what chapter its in)
Defeat Cragalance without any damage to its butt. (I have no idea on what weapon to use, so it would only hit his face instead of its back)
Charge through and defeat 15 enemies before disembarking the Exo tank (Any suggestions on what chapter I should go to earn that accomplishment)
Exceed 8,000 points on the practice range (Air Battle) damage counter. (I cannot seem to reach any higher than 4,000. Is there a weapon I should use to be able to exceed over 8,000?)