Originally Posted by syun_ukiya
no you don't.. celestial weapons have this so called "invisible damages" eg: tidus damages more if his hp is full, auron damages more if he's in critical etc. etc. also it damages dark aeons more.
in addition.. aeons break dmg limit (except for bahamut, anima and magus sisters) depend on getting one celestial weapon for a character. eg: ifrit's break dmg limit depends on completing auron's ultimate weapon.
that can never happen in your customized weapon. its worth the time.. try getting it.