General

night lord or dual blade

so i currently have a 230k range on my lvl 186 dual blade. im attempting to merch atm but i only have around 3b. im getting a lot more money soon possibly around 10-20b. if so, is it better for me to switch to a night lord or stay on my dual blade. i love bossing and sometimes i do dimensional invasion. what class is stronger in general? and if possible leave pros and cons

my current equips are:
fafnir dagger=268 attack, unique terrible pot (looking to recube)
renegades katara=140 attack 25 all stats, unique pot 18% att 3% all stats, B neb 18% ignore pdr

what claw can i get with 10-20b and will it increase my range or decrease it?
thank you so much in advance!