After tomorrow 100 how many levels of accessories are appropriate?

After tomorrow, the handles of middle and auxiliary weapons accessories will be upgraded to level 9, and the other level 5 or so is the most suitable.

Because before the tenth grade, the number of parts that need to be upgraded is very small, and after reaching the tenth grade, there are more materials that need to be upgraded. The character can only inherit 10% of the sub-weapon attack power, so it can be upgraded to level 9.