no matter if you want another weapon this is the fastest way to do the questline...
the 3 metals you need are copper,silver and barium so do mine crafting everday until you get these 3 metals
for farming you need around 11k spirit orbs
get the 11k (i used essential essences and made about 1k a day )
( 1 ) its time to make your weapon which will be the mace ( copper ) so upgrade its metal to celstial copper
after you get done with celestial copper quest ( which is why the 11k spirit orbs was needed ) you have unlocked the weapon kits
now do the basic weapon kit 3 times
now do the advanced weapon kit 3 times
now spam doing the ultimate weapon kit until it drops the rest of the needed to merge the blinding mace ( the 2 bright aura )
( 2 ) now its time for the 2nd weapon which will be Blinding Bow (silver )
complete 1 finding frags with blinding mace for the brilliant aura needed and spam ultimate weapon kits or essential essences for any other materials needed
( 3 ) now its time for the Blinding Blade
use finding fragments of the 2 previous weapons to create it.
( 4 ) now its time for the BLoD itself this will take a total of 110 quest turn ins
Blinding mace = 75 turn ins
Blinding Bow = 25 turn ins
Blinding Blade = 10 turn ins
congrats you now have a BLoD and it will took about 10 days at the maximum ( depending on how long you farmed for and if you got the required metals fast or not )