LV 100 only?

[sange]

some of the combining weapons say lv 100 *insert class name here* only with at least *insert stat number here*

do they have to be lv 100 or can they be higher?

[tiltnkirby26]

100+

[satoshi1]

I assume you mean the character at level 100. You have to be level 100 OR above.

[OniTatsujin]

lv 100+ so it doesnt matter what lv you are as long as you are higher or at least lv 100