Originally Posted by KillerRabbit

In 1-2 a level 20 fighter with the 20th level right equipment rules the game. Hand of Vecna + Blackrazor + Sword of Kas (dual wielding) + Ring of regeneration + Full Plate +5 + Amulet of Magic Resistance will beat in any other build. The way to make an interesting fighter is to give them interesting equipment.

You are assuming that the Wizard is a evoker trying to "throw bigger numbers". That is NOT how a high INT wizard would act. He would first, cast mordekainen's disjunction. All OP gear from the fighter will become mundane. And you are comparing a fighter with the best gear vs a "mundane" lv 20 mage which is his journey to lv 20 probably crafted a lot of powerful magical items.

As for attacks of opportunity, the mage in question if he is smart, he will avoid being hit.

Originally Posted by KillerRabbit
Again, that's well argued but I still get stuck where the rubber meets the road -- I just have more fun playing unbalanced games. BG2 and DOS2 were just more fun than NWN2, IWD2 or PoE1 (combat only -- everything in PoE was great, except combat)

Every amazing RPG which I played is extremely unbalanced. I don't know a single RPG which is balanced and I loved.