A question from a starting BRD...Follow

Singing skill or CHR? or both?

I'm going to take a guess and go with singing skill.

Debuffs:
It depends on your target mob. For leveling, it should be ok to stack CHR. If you happen to be over CHR'ed, your returns will start to diminish, and you'll want to start stacking Skill and MACC. At 75, this happens to be around 120 CHR. During leveling, it is more forgivable to only wear CHR for debuffs, but once you hit 75 you'll want a better complement of gear.

Recent testing on magical accuracy has shown that CHR and Skill add the same amount of accuracy on debuffs, provided you don't go overboard. Use your own discretion to figure out what 'too much' is.

Buffs:
Buffs are affected by Skill. Some buffs do get more potent as you add skill, though you'll have to do your own testing to determine how much skill is needed to raise a particular non-75 buff.

This has changed. There's a nice influx of new research across several sites now that show this isn't quite correct.

Basically, in terms of magical accuracy, 1 Skill = 1 CHR when the difference in CHR between you and the mob is less than +10, otherwise 1 Skill = 2 CHR. ie: If the mob's CHR is 50 and your CHR is 60, you get the equavalent of +60 Skill. If the mob's chr is 50 and your chr is 80, you get the equavalent of +70 Skill.

The problem here is that you usually don't know what the CHR total on the mob (for every mob) is. Ironically, it seems that most common HNM (sky, kings, sea, etc) have a common cap around 120 for most stats - hince the magical 120 number (which, to note, is casually 'thrown out' for many things -not just brd- and generally respected, despite no real testing or evidence).

If you can read japanese and understand some pretty advanced number crunching like "Pearson chi-square goodness-of-fit" in statistics for obtaining 95% certainty, as well as record keeping of over 20,000 spells...you can find the info here: http://lodeguy.blog69.fc2.com/blog-category-17.html