Hello! Welcome to the forums, I am also a massive FFVII geek, one question for you is this: Aerith = love or hate?

Onto the killing of the Giant Cactuar, first off he is massivly weak to water, so you need to make 100 water spells (via magic refine, I think its the Ice magic refiner that you learn from shiva should do the trick) and then Junction them to Squalls elemental attack, I assume seeing as your hunting the cactuar you have the Ragnarok right? You need the Aura spell just about 3 or 4 of them should be sufficient, then you can go hunt cactuar, if you don't have then you need to pay a visit to the Island closest to Hell and/or the Island closest to Heaven a BIG warning though, the monsters on those island are INCREDIBLY tough, and if you have trouble fighting Cactuar then they would simply destroy you, so you need to put the ability Encounter None on (learned from Diabolos) if you don't know where the 2 Islands I mentioned are then take a look at this handy map:


the nameless islands that I circled are the ones, you want to pay a visit to, the draw points are all invisible but on the bright side they are all on the edge of the islands, so just run around and tap your x button till you have enough magic (not only are there Aura spells there but other awesome one such as Ultima, Full Life (great for elemental defence) Holy, Meteor and many many more) with a healthy stock of Aura spells at your disposal you need to have one of your team members cast Aura on Squall and then keep skipping your turn till you get a Renzokuken, if your smart and junction the awesome Ultima spell to his strength then you could even kill him in one limit.