Whenever you enter a Boss room, you will get charged up in defense and attack. You should see one or more red rings glowing around your Mag or shoulders. There also should be red and blue symbols to the right of your HP/TP bars. Get to a Boss warp, such as the Forest boss (the dragon). Before you enter the Boss warp to the room, use a Telepipe or the spell Ryuker. Go in the warp and defeat the Boss. After that, when you are back in Pioneer 2, you should see the Telepipe that you created. Go back through that and enter the Boss' lair again. The Boss will not be there, but you will still get charged up. Quickly find the warp and take it to Pioneer 2. After that, immediately enter the area that you want (caves, mines, ruins). When you appear, you will still be charged up. This should work with every Boss under any difficulty setting. This is an easy way to have the advantage while playing through the levels.