Use the following trick to get Vincent's best weapon, Death Penalty, leveled up with minimal effort. First, make sure you have a controller with an auto-fire feature, Fury Ring, and the Mega All Materia. Once you have given Vincent the Mega All (for Slash All), you can go almost anywhere on the world map with a fair amount of space. The weaker the enemies, the better. Also, avoid towns. Make sure the view is behind Cloud on the world map, and not above him so that when you hold the D-pad you will turn and run and not continue in one direction. Give Vincent the Fury Ring so that he will always be in berserk status and will always hit all enemies. Then, tape Right or Left on the controller and set the auto-fire to Circle. You should be running in circles, and when a fight occurs, the only option available will be for Vincent to slay everything in a single blow. Enemy Lure is useful.