Seems somebody is MSEA figured out the EXP formula for Pyramid PQ ....

http://forums.asiasoftsea.net/showthread.php?t=753979



In short, exp for hell mode S Rank is 77000 + (kills*2)+(cool*10).

1.EXP IS NOT AFFECTED BY MISSES
2.For every cools you have, your exp is increased by 10
3.For every kills you have, your exp is increased by 2

Bonus exp for easy mode S rank = 60500 exp
Bonus exp for normal mode S rank = 66000 Exp
Bonus exp for hard mode S rank = 71500 exp
Bonus exp for hell mode S rankd = 77000 exp
EDIT: *Having extra party members will increase exp. It is either 11% bonus exp or 8557 bonus exp per party member (not confirmed)