So let's start with warzones 1-3
As seen above, there are 12 unique monsters (lost berserker can be found in 2 warzones) and each of them gives 50 charm points, so in total warzones 1-3 can give you 600 points.
Now warzones 4-6 which are a bit more complicated.
|high voltage elemental||25p|
wz 4-6 have 11 unique monsters (I'm not counting mole because there is wz4-5 and humongous fungus because it is in wz 1) and you can get 480 points
So by finishing all monsters in wz1-6 you can earn 1080charm points