adrastos indeed it can be 20%. Number staff is not about max stats (but it would be ofc very nice to have.)
It is about matching out all numbers on a staff, since staff has the most Number Components fixed to a GW-Item it creates the highest RNG for matching out everything. ( HSR mod, Energy, Dmg, Inherent mod and Goldvalue)
On 10 energy instead of 9. Ardunain staff would an 18 Match on HSR and Dmg. The energy 10 match to 10 Dmg ( wich would look amazing bzw with both in the bold white font and sitting on each other) and the req 8 match to 8%inherent mod ( Wich could be also 9% for Max, ) also the 8's are same font and the Lines exact next to each other ( Sadly the number would not stay exact on top of each other) but the 8's could then make the (sadly not there) 88g Value like the gaps fit and "Form it".
Example:
......Req8
..................... HCT8%
8. 8 Gold value
It's not a generell abproach to see or valuate items but it's a fun way to see a purple staff becoming something "rare" you would like to own.
And the variations can be quite a few. Like max Stat matchings. 10 energy, 20% HSR and a 20% condition mod ( max mod on purple) bering the holy grail for that.
Also the rarer the skin the better and so on. By adding quriky none perfect mods (wich are also not really like rare but hard to get cause not really sold on market and hard to self farm an exact like +1/18% EARTHmagic wrap. Or a 10% Ench wrap or 8% swift heads. It's a fun topic with many things that I enjoy.
It's quirky and may be weird to others. And it's not q7 unconditional triple mod weps. But it's also not sooo easy to achieve a perfect one and it's fun to have fun with it. Specially with purple Staffs other would consider trash and you freak out about them
Hope it's understandable explained my English allrdy caused some misunderstandings here unfortunately. Just thought I share the topic with you and my thoughts on it . Dunno if other people Interessted in such stuff. Could make a thread where everyone can post quirky numberstaffs he might have or find