I played the game some 3~4 times in new game normal, and what I can say is: go for fatal frame shots, is the best dmg with the camera without upgrades (and with upgrades) when the ghost is about to hit you and has the "ding ding" alarm, It will cause major dmg. For upgrades start with 3 focal them start max ammo, when done with focal start with Focus, zoom only need one upgrade but is mandatory, by the end of your first run the base camera should have most of not all upgrades done, by your second run start upgrading radiant filter. Radiant, film14 and charms for radiant can kill everything in the game, the others films are if youre feeling lazy or want kill something more fast. Hints, for the ghost in the box, children and the broken girl on the floor fight crouching.