solo challenge help.

[boys from the dwarf]

i figured yuffies stats with her being a ninja would make this a good challenge. i have two rules,

1. no KoTR.
2. only one counter attack materia.

by bosses i mean ones that are actually close to impossible to beat without another character E.G. reno is pretty much impossible to beat solo because of his pyramid attack. i know demon gate is hard but its not impossible. im doing a little research on materia but i already know some good combninations. i think bottomswell will be the only impossible boss unless there are others with instant death attack (in which case i might just hope to get lucky and hope they dont use those attacks.)

i know that when you go to wutai yuffie takes your materia and runs so i'll need to use characters for that bit but thats about it.

EDIT:

I've just thought. carry armour has that arm cage attack but i think i can disable the arm before it used that move.