Well when I played the game the first time I thought it had more of a magic spell casting feel to it. And all the kits have some cool things about them. But I f you want to make your own party. I would have.
A Paladin
Thief I would say that you need one for sure. Dual or multi. Maybe multi with magic user.
Magic user straight kit.
Cleric muti with a fighter. Or a staight class.
Fighter I would go with berserker of some sort or a barb.
Maybe a druid or sometning of the nature. Or maybe a monk.
Tough choices for me they all have there good points. But your party looks good. If it was me I would use the npc in the game.
And welcome
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Give me Back my glasses.
Lord of the blind.