Here's a question for you DMs here. How would you handle someone who is wanting to make a skill check using two related skills simultaneously? I'd say do the secondary one first at a DC 10 or so, if it succeeds, then they get a +2 or so bonus to the skill they are using primarily.
Example, a Bard with ranks in Perform (Sing) and Perform (Stringed Instrument) is wanting to make a performance playing his lute (or whatever) and singing at the same time. With the method I was thinking, first he would make either a DC 10 Perform (Sing) check, or a DC 10 Perform (Stringed Instrument) check, and if that one succeeded, it would give a +2 bonus to their overall check result.
Example, a Bard with ranks in Perform (Sing) and Perform (Stringed Instrument) is wanting to make a performance playing his lute (or whatever) and singing at the same time. With the method I was thinking, first he would make either a DC 10 Perform (Sing) check, or a DC 10 Perform (Stringed Instrument) check, and if that one succeeded, it would give a +2 bonus to their overall check result.