Your "You're Already Dead!" tips and explanation is not working for me to get the 650 hit one :c
But it gave me easily the 10m damage trophy ^^
Also the "David Attenborough" seems to pop up before you kill the "They Mostly Come Out at Night" monsters
The "weapon king" tittle seems that needs the weapon's DLC too if you have them installed.
Also, the free DLCs gives you plenty of money, TP and EP to get some shopping/crafting trophies easily, I bought every DLC and they really help a lot for this trophies