I'll try to get on a non-lukless bowman and test it. No promises.
e: 4+2 luk = 120 exp lost (6.99%)
4 luk = 120 exp lost
5+2 luk = 113 exp lost (6.59%)
6+2 luk = 108 exp lost (6.29%)
2*4 = 8, 1.6*5 = 8, 1.33*6 = 8
Bowman formula: 5+8/LUK
I'm reasonably happy with this proof :p also that 2 luk = 0.7% less lost per death is pretty decent if you're training slowly (eg. 2%/hr) without charms that's 20 minutes per death.
e: 4+2 luk = 120 exp lost (6.99%)
4 luk = 120 exp lost
5+2 luk = 113 exp lost (6.59%)
6+2 luk = 108 exp lost (6.29%)
2*4 = 8, 1.6*5 = 8, 1.33*6 = 8
Bowman formula: 5+8/LUK
I'm reasonably happy with this proof :p also that 2 luk = 0.7% less lost per death is pretty decent if you're training slowly (eg. 2%/hr) without charms that's 20 minutes per death.