You've probably already started but I would recommend taking the Bishop out of there. If you're melee heavy, don't use him. I would recommend a Lord instead since you're still going to have plenty of magic. I ran 3 Gadg. and they did fine. I find the Bishop almost too good so I don't use him. Maybe in a 2 person party or something?

The bishop is necessary to get the priest and mage buffs early. At lest in expert/ironman, this is very important. If you just want high early offensive power, a mage is usually much better.

I'm running a 4 person party now of sam, ninja, gad, and Fighter/cleric. It's been a great party lvl 21 going to assention peak. The fighter cleric is duel wielding beastslayer and diamond eyes and by far is the most effective than the other two sam, ninja. I did 2 levels of fighter then switch to cleric until I got 5th level spells then back to fighter. Sam and ninja using bushido blade and ench. w. and nunchucka. gad. using neg air and heal all stone with an awsome omni gun. the omni gun seems more effective at special effects than the percentages suggest. It's been a great party, I think I will change the ninja to a Ranger next.

I'm really surprised that people don't use the Gadg. more. Now that I have a party of 3, I think all my future parties will suck in comparison. Three Vaporizor's and the battles get real' short!