So, I'll repost an email sent to my GM, regarding whether wielding a dagger in the off hand gives a rogue +1 to attack using the mainhand. As the player in question, the logic is focused toward supporting my own position.
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So I'll make my case for why it should work the way I thought it did:
1) Melee Attacks: "Simply wielding a weapon in each hand doesn't allow
you to make two attacks in a round. If you hold two melee weapons, you
can use either one to make a melee attack.", Page 270. This implies
that you may wield two weapons at once, though doing so confers no
default mechanical bonus.
2) Two-Weapon Fighting: "While holding a melee weapon in each hand,
you gain a +1 bonus to damage rolls with your main weapon.", Page 201.
This implies that if you are holding a weapon in each hand (one of
which has to have the 'offhand' keyword, though that is stated
elsewhere), you deal +1 damage with the weapon that you use to attack
("main weapon").
3) Rogue Weapon Talent: "When you wield a dagger, you gain a +1 bonus
to attack rolls.", Page 117. Notice that it does not say "When you
attack with a dagger". Compare this to the wording of, for example,
the Nimble Blade feat: "When you attack with a light blade and you
have combat advantage, you gain a +1 bonus to attack rolls.", Page
199.
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#2 isn't particularly relevant. So, thoughts on the matter? I didn't see anything in the errata.
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So I'll make my case for why it should work the way I thought it did:
1) Melee Attacks: "Simply wielding a weapon in each hand doesn't allow
you to make two attacks in a round. If you hold two melee weapons, you
can use either one to make a melee attack.", Page 270. This implies
that you may wield two weapons at once, though doing so confers no
default mechanical bonus.
2) Two-Weapon Fighting: "While holding a melee weapon in each hand,
you gain a +1 bonus to damage rolls with your main weapon.", Page 201.
This implies that if you are holding a weapon in each hand (one of
which has to have the 'offhand' keyword, though that is stated
elsewhere), you deal +1 damage with the weapon that you use to attack
("main weapon").
3) Rogue Weapon Talent: "When you wield a dagger, you gain a +1 bonus
to attack rolls.", Page 117. Notice that it does not say "When you
attack with a dagger". Compare this to the wording of, for example,
the Nimble Blade feat: "When you attack with a light blade and you
have combat advantage, you gain a +1 bonus to attack rolls.", Page
199.
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#2 isn't particularly relevant. So, thoughts on the matter? I didn't see anything in the errata.