i heard that there is a weapon that has all materia slots linked together.so you can have a holy element sword (using life 2 because its classed as holy witch will kill undead) so have:

revive (2 stars+)+final attack+elemental+all.

hp trick equip:
restore (prefable 4 stars)+elemental+mega all=when you attack you will recover hps insted of damage with slash all you heal every one up to 9999 hp with out using any mp.