can twinned arrows be used with vicious aim and/or swift aim?

Nope, I did a respec on my ranger as a result when twinned arrows came up.

Does it work with crossbows or arbalests?

 

People say it works with bows and not guns but I've not seen anything about crossbows.

The ability says hunting bows and war bows only.

Other question: do both arrows have the chance to proc special enchantments like prone/stun/confuse? That would be very useful because it would double the chance of causing an affliction.

Other question: do both arrows have the chance to proc special enchantments like prone/stun/confuse? That would be very useful because it would double the chance of causing an affliction.

Yes they do.

But chance would not be doubled. 50% twice results in 75% chance.

For other content entertainment, check this video out of a person who wanted to get a rate of fire higher than Twinned arrows.

What? Without twin arrows I had a chance of x% to cause an affliction. With twin arrows I have two chances. Two is two times one - so it's double!

What? Without twin arrows I had a chance of x% to cause an affliction. With twin arrows I have two chances. Two is two times one - so it's double!

 

Isn't that what people said about the split in black jack? More chances to fail and succeed.

Edited September 15, 201510 yr by Ymarsakar

What? Without twin arrows I had a chance of x% to cause an affliction. With twin arrows I have two chances. Two is two times one - so it's double!

Sort of. I guess it depends how you define doubled. Like someone said earlier, 2 50% chances ends up being a 75% chance total, rather than 100%. 

Of course.

Do the twinned arrows always both attack the same target or not? If they do, then it is 75%.

 

There are four cases, represented with A and B denoting a successfully applied effect with one or the other arrow:

 

1) AB

2) Ax

3) xB

4) xx

 

It is the same type of problem that you have to determine the chances of a dominant trait being passed on by two parents having one copy each of the allele (50% chance per parent, since genes come in pairs). The child has a 75% chance of inheriting the trait, because the only way for him not to inherit it is for neither parent to pass it on.

 

A Mendel square to calculate odds of a "dominant" effect (you only need one copy of it) being "passed on" from "parents" (the arrows) to "child" (the poor enemy)... a little unorthodox, but it works .

Edited September 15, 201510 yr by Nobear

What happens when driving flight is used with twinned arrows?

 

What? Without twin arrows I had a chance of x% to cause an affliction. With twin arrows I have two chances. Two is two times one - so it's double!

Sort of. I guess it depends how you define doubled. Like someone said earlier, 2 50% chances ends up being a 75% chance total, rather than 100%. 

 

That's the chance of both of 'em procc'ing.

 

It's like trying to roll a six on a d6. 3 dices... triple the chance. Rolling a 6 3 times in a row would be calculated the way you did it, which would be (1/6^3)%

Twinned arrows + driving flight = 4 arrows per shot if there's a second target behind the first (driving seems a lot better now - they don't have to be that close). I think it's viable to skip penetrating shot. Bloody slaughter and load up on the +20% dam against spirits/beast/etc. feats or take the +pet damage talents.