i m from malaysia... my advice is...try to open every boxes,dun open the same boxes...
for example...
1 2 3 4
5 6 7 8
9 0 a b
c d e f
if u reach lv11..u choose number 1 box...but unfortunity...u drop...but the next time u reach lv11 again...try to avoid the number 1 box n open the other boxes...
i using this method...few months i get full set of eq....(3 tower shirts ooo^^)