Phantom was quite easy I think ( As long as you cast haste on that damn clock) and Kurt Zisa was a fair challenge (blocking magic then physicaly attacks got really annoying) But Sephiroth is probably the hardest boss. Sin Harvest is probably the most dangerous attack in the game, so If you see the Sin Harvest animation begin, its too late to stop it, so get your menu ready to use an Elixer as soon as it hits (and get away from Sephiroth incase he hits you straight after Sin Harvest)
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