Refinement System Question

[februaryxiv]

Hello sir,

I hope you're doing great!

I have a question about the Success chance with normal metals (Assuming Oridecon/Elunium or other normal metals??~_~) when doing refinement in weapons. In our wiki it says that:

Weapon lvl 4
+6 -> +7 = 40%
+7 -> +8 = 20%
+8 -> +9 = 20%

In my understanding it's better to refine weapons gradually. I need to reach +7 then refine it again to +8 to have a 20% success rate compared to just inputting 8 in the NPC and it would only have a 1.92% chance

Weapon lvl 4
+0 -> +7 = 9.6%
+0 -> +8 = 1.92%
+0 -> +9 = 0.384%

Please let me know if my understanding is incorrect or kindly share what is the correct interpretation from wiki.
I've been doing the "one go (8 or 9 input in NPC) input" process and would like to maximize the success rate.

Thanks in advance!

[kreuzbube]

Statistically it makes no difference.