i can give u the link so u can watch at home
You must be registered for see links
(ill also gonna pm it to ya

)
a little explation :
at a certain points u can catch fiends and customize weapons
the thing is u need to catch specific fiends to create a boss
when u have defeated the boss, it drop weapons with empty slots
then u need to customize like for example: APx3 !!
then there is tha other trick also mentioned in the vid
u need to create a boss (don tonberry) .. u dont need to kill him .. the point his u need to get to close to ya and then flee ( he instan kill 1 of your char .. so u need to revive him) when u flee u get tons of xp

my max xp is 999.999 xp
phew happy to help you

, others can use it too

!!