Enhancement Tiers for Weapons?

say you are 60% scrolling a weapon with... 130 attack.

cheaper to just enhance for extra 3 attack, than waste 2 hammers for 4 attack. at least in scania, those hammers can get you another 130 sword (example)

good example is a glaive if you don't have AEE's, but you should have AEE's if you are using 50%/GM's

say your glaive is 140atk unhammered.
you enhance it 8 times, then scroll again.
4* = 152atk
+4* = 168atk
hammer = 178atk.

now with a hammered 150atk glaive
4* = 166atk
+4* = 182atk