%w.att,? Total Damage % ? huh?

I'm saying having total damage or ATTACKS is better than % luk, since 8% luk will convert to 4% overall damage increase if you have 100% luk bonus at hand already. Compared to 8% total damage or 8% ATTACKS, those two will be better than % luk. Luk is still good but just doesn't provide as a good a bonus, that's all.

I was sure total damage % stacks, but I won't be cubing weapons anytime soon to get two total damage lines to test with. If it doesn't stack, boss damage/total damage/ATTACKS should be the best 3 options on a weapon.

Supposedly, the loss on dmg from the %WATK bonus on apple can be anywhere from 25% to 50% for individual cases. For DB and their low base WATK on the Katara, I expect the loss to be rather on the bigger side (close to 100 totalATK on Katara hits)

Additionally, if we try to be generous in our estimates, +50% luk would be appropriate for an average DB, in which case, the 8%luk you proposed would give over 5.3% total damage boost.

In the end, there isn't really big a difference choosing between those two, even though %luk seems slightly superior to %atk in a rather realistic scenario. Still, it doesn't make enough of a difference to be significant.