General

More Boss% or more Atk%?

Im currently sitting at 209% boss damage and about 50% total Atk and 90% ignore monster def
lvl 218 Dual Blade, 2.3m range with out final cut, 3.2m with final cut.
Question is, would I benefit more from extra boss% damage or more atk% damage?
Dagger currently is at legendary tier with no boss or atk lines, so I can cube my dagger for either atk or boss damage depending on your opinions.