I don't know if it's a bug or just malicious design/programming, but I'm getting mighty tired of my guys being "too far" away from enemies that are right in front of them, enemies that can hit my "too far away" guys with their own melee weapons.
That"s why extended weapons are so powerful, close combat ones show more damage but they can't reach anyone half the time at least, the only reason to have one is on a thief (for backstab) or a fighter (for berserk) when you're about to fight really strong enemies or hp sponges.
Still, one is enough, none at all is better.
I found out that a Ranger was not that mandatory, so I restarted.
Using my imported characters my party is:
Rawulf Lord
Fairy Ninja
Dwarf Valkyrie
Felpur Monk -> Bard (five instruments imported)
Mook Samurai-> Gadgeteer
Elf Samurai
Biggest weakness is lack of the Mage protection spells. I could have turned one of the Samurais into a Mage instead, I guess.
I like the idea of Ninja throwers, since a hit will always penetrate unlike their melee attacks.
The Ranger is great because of Ranged crits and focusing on a ranged weapon (I usually put him in the back of the formation), he always fights with a ranged weapon, which means you don't have to increase his other weapon skills and he will shoot enemy mages from afar.
The Samuraï is a mixed bag, I love lightning strike but I've read it proc more often when you don't use magic at all (probably only in combat but I'm not sure) and I've noticed Samurai "mages" don't lightning strike often myself.
Gadgeteer and Bard are great but you don't need both, they more or less do the same things.
Of course, If you don't want to pick a mage, maybe it's a good idea to pick both of them.
A wizard is mandatory, in my opinion, on your first Wiz 8 playthrough, you'll get swarmed and his mass debufs are required, even if the bard or the gadgeteer get some, they require the gadget or instrument and they're heavy, particularly the gadget so they can't keep them all in their inventory, it's even more true for the gadgeteer because his projectiles are way too heavy.
A monk with an extended weapon shines from mid-game, A Valkyrie with a polearm is quite good but you can recruit Vi pretty early.