Some minor information from Attributes Washing

This is already not a surprise to many I guess:

For for those who do not know.
Washing attributes success rate is more or less the same

ie. using 2000 honors, 2 gold, 5 gold, 10 gold and 20 gold.

So why bother use 20 gold, u might ask?

Its basically the rate of increase
2000 honors -  + 1~3 attribute increase
2 gold - +1~5 attribute increase
5 gold - ?
10 gold - +1 ~10 attribute increase
20 gold - +1 ~ 20 attribute increase

So depending on how u are willing to spend.
If you are unlucky, u may get 20 gold for just a +1 attribute.
Based on this model, determine how you want to up ur attributes :D