If you are having trouble with Bosses and want to avoid going through the enter level again after dying, use this trick. Use a Telepipe or the Ryuker technique at the entrance to the Boss. If you die, then you can just go over to the bank and find the teleport that you made. Go through it, and you will get back to the Boss. To kill the Bosses from the forest, cave, and mines faster, you can use weapons like the Saucer or use Rares such as Slicer Of Assassin. Keep using hard attacks, and in about ten minutes it should be dead.