The designed objective of the game isn't to get your characters so strong so quickly that you can tromp over everything in sight. I tried that in one game, and it became so boring that I never completed it.For your interest, the game was MM8, and I played it in a way that allowed me to get a collection of level 50 NPCs very early. The result was that there was virtually no character development left to do, and no opponents that could give my party a decent fight. Like I said, boring.
It's fine by me if you want to play the game like that, but at least, be aware of the downside. 
