- Balance is importent, even in a single player game.
If we have class A and class B and class A can do everything better than class B, why add class B to the game:
Example from pathfinder: Rogue and Vivisectionist
Rogues have sneak attacks and a rogue talent every second level. Vivi has the same HP, BAB, sneak attacks and talents, PLUS spells ( that can be cast in armor and you can use self only spells on others with infusion ) and mutagens (bonus to stats and AC that stack with everything plus extra attacks with feral mutagen)
Also every class with animal companion is better than the same class without animal companion in most cases. A sorcerer cannot hit an elephant right in front of him with a weapon and you can cast only a few spells? No problem, the (buffed) pet of my sylvan sorcerer hits like a truck while I can focus on buffs, CC and even more summons.
In PnP it must be even worse. A wizard can solve almost every problem with a spell, a druid has an animal companion who hits things plus he can transform into an animal that hits things plus many spells. At the same time a melee martial char can be happy to be the meat shield of those guys, so they do not need to use a spell slot to summon a meat shield.
No, is not. I strongly disagree.
Balance would ruin ANY game.
Imagine if on Fallout New Vegas, they had tried to make
someone running with a knife effective as someone with a anti materiel rifle and explosive rounds at a open field, for the sake of balance. Magic on high magical settings are like firearms IRL.
All masterpiece of CRPG's are unbalanced. BG2? Unbalanced. VTMB? Unbalanced. Nosferatu is a hard mode and there are no way to put deformity in a highly social game without it being game breaking harder. Arcanum? High technology and high magical characters are too powerful. Harm is the best spell for the first dozen of horus. Fallout New Vegas? Unbalanced. Melee is far weaker than ranged.
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And you are ignoring that the focus on this game is role playing. You can beat pathfinder with any pure RP build. Also, most TT modules tends to be way less combat focused. Kineticist is not considered a "op" class on P&P but is amazing on Kingmaker exactly because the class can dish a lot of damage.