Welcome Charmy,
You seem to have really researched what you are doing. I found that I needed 2 wizards and I used lizzards. Although their hit points are low they are really strong and I don't find that they die all the time. I made a pixie into a Rogue and she has been the best of all, but I made the mistake of making her into a vampire and have to keep watching her points. Tough spells keep her going and she can still use all her spells. She is a Ninja which is great. I haven't got to Zen Master yet but if I don't before the end of the game, I will start it over until I get one. Best game I have ever played. Although I am still a Phantasy Star fan! Keep posting so we can all see how you are doing.