[quote name='oremites']If it got boring reusing the same strategy over and over, can't you try using different strategies just to keep things interesting? Just because you CAN beat all the bosses using the same strategy doesn't mean you HAVE to do it that way.[/QUOTE]
Not much strategy to begin with. You can equip 6 different medium in this game: sky, sea, water, moon, mountain, and luck. All of them give a unique a skill, magic, force skills (sort like limit break), open more accessory slots and stat boost. The more you level up, the better the abilities you get. The problem is each medium comes with fix skill tree, you can't mix and match a variety of skills like final fantasy. You can only equip one medium per character, and 3 party members per fight. You can switch your party members, but it will cost you one turn doing so. So, it's more effective to stick with your main party.
Certain mediums you will use more then others. Healing is essential in every rpg. But in this game, there is limited options. It is either using the sea medium or berries. Berries can't be purchase at shops, they can be acquired from berry trees, stealing or standing on right hex after wining in a battle). Stock these berries are very time consuming, it easier to use sea medium instead. A must have on boss fights.
Stealing medium is another must have medium in this game. Majority of boss fights carry rare items or stat enhancing items. These rare items are need to fusing powerful equipment.
That leaves with one medium to use, it's either moon, mountain, sword or sky. Moon and moutain is kinda useless since they carry pro or anti hex skills. And their stats boost increase defense capabilities not offensive, dragging battles long then they should. You probably use sword medium for it's physical stat bonus with magic attack. Or sea medium for it's magic bonus and magical attack. Very good when paired with proper equipment like dual cast with elder record or terrance tiara