Player efficiency WN7 algorithm

following average values are used to calculate rating:
win rate, damage, frags, spotted, defence points, average tank tier
WN7 formula:
(1240-1040/(MIN(TIER,6))^0.164)*FRAGS
+DAMAGE*530/(184*e^(0.24*TIER)+130)
+SPOT*125*MIN(TIER, 3)/3
+MIN(DEF,2.2)*100
+((185/(0.17+e^((WINRATE-35)*-0.134)))-500)*0.45
-[(5 - MIN(TIER,5))*125] / [1 + e^( ( TIER - (GAMESPLAYED/220)^(3/TIER) )*1.5 )]

0-499
very bad
500-699
bad
700-899
below average
900-1099
average
1100-1349
good
1350-1549
very good
1550-1849
great
1850-2049
unicum
2050-9999
super unicum