That's a pretty good boss killing team depending on your classes. Kevin is easily the best damage dealer of the six and Hawkeye and Riesz have classes that specialize in buff/debuff spells so they tend to be really good at destroying bosses, though healing might be a problem...

Course in my playthrough of the original, I'm near the end and I rolled a team with no healing magic as well and it's not that hard to do.