Ah, FF1 memories.
If you download an emulator and ROM to play it on your computer, I would suggest this party next go around: 1 Fighter, 3 Black Mages. Kill the Mages as soon as possible, and then all XP will go straight to the Fighter. He will level up 4 times faster and it makes for a very interesting game. The only reason I suggest using an emulator for that set up is because of the Crawl fights in the Earth/Marsh caves. Their stun ability is extremely annoying and it's nice to be able to reset from an earlier save state.
Back to the OP, Jack is a very appropriate name for the Red Mage. "Jack of all trades, master of none"