Just wondering about it. I was through it’s around 230, until I saw 220 masketeer 
So, what exactly it is?
ps. One step closer!! 
Someone correct me if I’m wrong but I got this from a couple of old threads and took the averages:
Rank 2 - 15~20
Rank 3 - 40~45
Rank 4 - 75~80
Rank 5 - 120~125
Rank 6 - 170~175
Rank 7 - 220~225
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rank 6 ~176
rank 7 ~223
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Rank 5 is wrong, I am lvl 124/class14 but I still need 50 lvl 6 exp cards to get to 15. I can probably get to lvl 127-128 by then.