S- % Damage==Damage To Evil %>Enhanced Damage>Elemental Property
Also you should have minimum 25 SL DMG + 25 SL Property with both weapons together.
Don't forget about crit chance and crit damage if you're archer.
Example:
Main Hand Weapon:
S- 15% Damage, SL Damage 15,Enhanced Damage 125, Damage To Evil 7%,Light Property 100
Sub Weapon:
Overall SL Stats 10, SL Property 15 and other shells.