Let's say 99 dex + 70 luk, which is a level 85 blacksmith.
120 rough elu = 24 elu normally
120 rough elu = 33.8 elu with npc with 3-1 ratio
120 rough elu = 25.35 elu with npc with 4-1 ratio
99 dex + 80 luk (lv 92 blacksmith)
120 rough elu = 24 elu normally
120 rough elu = 35.8 elu with npc with 3-1 ratio
120 rough elu = 26.85 elu with npc with 4-1 ratio
4-1 ratio is hardly worth the bother to even script the NPC since the blacksmith needs to be pure forger build of just dex and luck, and even then has a neglectable improvement from the normal 5-1 100% conversion.
3-1 ratio is around ~10 elu difference at this high level. For comparison, Namin? can get 10 elu from raydric using a 120 int SL who can OHKO raydric 95% of the time. It'll take approximately 45min to get the 10 elu.
Mining is tricky to compare, since it gives both pure elu and rough elu at the same time... someone else who is bored with a better mathematical mind than Namin? can try to calculate that one.
