In addition (hope I got everything right from memory
):
Alb:
Thrust/slash/crush allows you to wield one handed weapons. Equipping a flex weapon, polearms or two handed weapon and attacking with a style from thrust/slash/crush will make you attack unstyled (both have their own lines).
Speccing dual wield will increase your offhand swing chance but basically requires you to spec thrust/slash/crush (see dmg calculation above).
Speccing critical strike takes dual wield (offhand swing chance) and thrust/slash spec (see dmg calculation above) into consideration.
Polearms and two handed also require speccing thrust/slash/crush (see dmg calculation above).
Flex (reaver) and staff (friar) do not require speccing another line, flex weapons naturally offer slash/crush dependant on the weapon, all staves are crush weapons.
If you only use polearms, two handed, critical strike and/or dual wield you need thrust/slash/crush at a composite (spec + sc + rr) of 52 (once you ding 50) to determine your base damage (see dmg calculation above).
Hib:
Critical strike and celtic dual work just like their counter parts in alb.
You do not need to spec pierce/blades/blunt when going celtic spear/large weapons/scyte.
Mid:
Swort/axe/hammer allow you to use both 1- and 2handed weapons.
Left axe always swings, you get the styles (and more dmg or crit chance (not sure here)).
Spears and hand-to-hand don't need a dmg line (they gain it from the weapon, just like flex in alb, large weapons in hib, etc.).
All:
Classes allowed to wield two weapons at once (all assassins, merc, bm, ranger, berserk) can always equip two weapons. They'll use the swing chance for their offhand (alb/hib) for all styles (both basic weapon and dual wield/celtic dual) while you have to use left axe styles to swing with the offhand (which is then guaranteed).
Staves are always crush, you can use a staff to perform critical strike attacks but will do unspecced minimum damage (see dmg calculation above).
Weapons with ammunition (basically bows and crossbows) do the damage stated with the ammo, not the damage stated on the weapon.
Weapon skill varies by (basic) weapon:
Str: Slash, crush, two handed/pole (even when using e.g. a thust pole/two hander), blades, blunt, large weapons, sword, axe, hammer.
Str/dex (half each): Flex, thrust, pierce, celtic spear, spear, hand to hand
Dex: Staves, bows, crossbows
As stated above: All from memory so don't quote me on that and feel free to add corrections...
