it depends on what ur trying to achieve. if ur wanting the 1st limit break in a new level then no, it doesn't matter which level ur set to, which just need to kill a lot of enemies. however, if ur wanting the 2nd limit in a level, then u will need to be set on that level and use the 1st limit quite a few times (usually around 7 or 8). mighte i recommend mythril cave for getting limits? (the cave just before junon) in the room that is a dead end and has 2 levels, with a ramp on the right hand side, enemies appear in 4 or 5's and the dragons use a flame thrower attack which fills ur limit bar rather quickly