I'll give what I know about weapons.
There are 3 different styles of attacks, slashing, impaling, and blunt.
Slashing is good at removing those annoying limbs from enemies and are pretty effective at bleeding them. They are effective against non-metal armoured foes and are extremely effective at killing creatures. My legendary swordsmaster has actually chopped bogeymen, night creatures, goblins, and all kinds of wolves and other animals in half. [You slash the ____ in the lower body and the severed part flies off in an arc!] <lol> However, they are generally not very effective at killing metal-armoured enemies.
Stabbing is considered "edge" instead of "blunt" for weapons, but is different from slashing. Polearms and spears are made for stabbing but other edge weapons can accomplish the same, though possibly with lesser results. Stabbing weapons are good for messing up your enemy's innards and causing them a good deal of internal bleeding. One drawback however is that stabbing will get your weapon stuck in the enemy quite often. Stabbing is the prime method of attack in a lot of larger beasts like Hydras where chopping off all the heads is difficult and blunt attacks not doing as much. A good stabbing weapon could pierce the lungs of said hydra with ease, causing it to bleed out or suffocate. Like slashing attacks, they aren't as good against armoured foes.
Blunt weapons are nice in that they are highly effective against armoured opponents compared to their edged counterparts. Blunt attacks can't slice off your enemy's sword arm but can shatter its bones. They generally aren't as effective as edged when attacking upper and lower bodies except in cases where the force of your attack sends the goblin's rib through their heart. However, they are just as effective at headshots. Whereas edged weapons would mostly deflect off armor, blunt can just smash right through it. Blunt weapons rarely get stuck in enemies but is almost a good thing when they do, as such a feat requires an expertly timed blow and/or colossal strength.
Personally I use edge weapons on almost all my adventure saves and train up their kick (counted as blunt) ability for goblin ambushes who have armour. You'd be amazed at how your character can become Urist McNorris, delivering legendary roundhouse kicks to their heads and killing those pesky armoured goblins instantly.