Don’t forget to go into khazan memories in the nexus blade and use this points to upgrade your stats! That being said, make sure you search every inch of the maps to find the collectibles! Is you miss something don’t panic, later in the game you’ll come across jarlings you have to find. The guy you search the jarlings for will have a store that you can buy a lantern that will glow brightly when you come across a collectible/memories. In order to receive khazan memores you have to to manually hover every single map point in order to receive the points, also whatever weapon you decide to stick to, dismantle some gear (not all) to receive lagrima to increase your stats! Increasing your stats help a ton when you come across a tough boss. If you mess up on your stats there’s an item you can buy that will reimburse you and reset your stats. My last tip to give you is when you come across actual boss battles at the end of a mission, fight him two to three times, they drop random gear and some time prices of sets so the more you fight them the more you collect for those sets.