Luk's Effect on Death Toll

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.

Can you perform a similar test on non-lukless warrior? I lose 9% every death with 5 base luk (total 42). I have a Hero friend who loses 7% per death and I have no idea how much base luk she has, but apparently less total luk because she doesn't have a HTP.