Pielorinho
Iron Fist of Pelor
My only problem with the opposed roll is that it adds two more rolls to combat and can get confusing.
I think that the rule of "I can ignore you, treating you as if you're invisible, until you hurt me" is simple, easy to remember and apply, balanced, and efficient.
If I ignore the fighter to concentrate on the rogue, then I won't suffer sneak attack damage from the rogue. However, the fighter might very well decide to disarm me or grapple me or sunder my weapon: normally I'd get an AoO against him, but since I'm treating him as if he's invisible, I don't. And woe be it on me if that fighter turns out to be a cleric and decides to cast a spell or two while I'm ignoring him.
Note that if he grapples me, the rogue can then pound on me to his heart's content: grappled opponents lose their dex bonus.
It's a risky maneuver in all cases except ones where it rightly shouldn't be (golden retriever vs. great wyrm cases).
Daniel
I think that the rule of "I can ignore you, treating you as if you're invisible, until you hurt me" is simple, easy to remember and apply, balanced, and efficient.
If I ignore the fighter to concentrate on the rogue, then I won't suffer sneak attack damage from the rogue. However, the fighter might very well decide to disarm me or grapple me or sunder my weapon: normally I'd get an AoO against him, but since I'm treating him as if he's invisible, I don't. And woe be it on me if that fighter turns out to be a cleric and decides to cast a spell or two while I'm ignoring him.
Note that if he grapples me, the rogue can then pound on me to his heart's content: grappled opponents lose their dex bonus.
It's a risky maneuver in all cases except ones where it rightly shouldn't be (golden retriever vs. great wyrm cases).
Daniel