Prerequisites: 5 ranks in any Craft or Profession skill.
Benefit: Choose one Craft or Profession skill in which you possess at least 5 ranks. You receive a +2 bonus on your chosen Craft or Profession skill. Ranks in your chosen skill count as your caster level for the purposes of qualifying for the Craft Magic Arms and Armor and Craft Wondrous Item feats. You can create magic items using these feats, substituting your ranks in the chosen skill for your total caster level. You must use the chosen skill for the check to create the item. The DC to create the item still increases for any necessary spell requirements (see the magic item creation rules in Chapter 15). You cannot use this feat to create any spell-trigger or spell-activation item.
Normal: Only spellcasters can qualify for the Craft Magic Arms and Armor and Craft Wondrous Item feats.
Your selected Craft skill lets you qualify for the crafting feat.
You can make arms, armor, and wondrous items. Does not matter which craft you selected.
At the end of this process, the spellcaster must make a single skill check (usually Spellcraft, but sometimes another skill) to finish the item.
You make the DC check using you Craft(Selected) skill modifier rather than a Spellcraft skill modifier.
Since magic crafting time is a function of value and not skill, it does not matter which craft you select. Ability to make it magic is likewise unaffected by which craft. Therefore your craft selection should be based on non-magic criteria.
Crafting Rules craft at (d20+skill)*(DC) in SP/week, having more skill and more difficult to craft items are the fastest crafted. However, it takes a lot of time. For example, a masterwork weapon adds 300 GP, needing 3,000 SP at DC 20 of craft time. At a minimum Take 10 with a 10 skill, you get 400 SP/week, meaning it will take 7.5 weeks to make the masterwork portion of the weapon. Armor is done in half the time, due to half the cost. Specific skill does not affect the time.
The only craft skill I know that you can speed up is Alchemy with the feat Master Alchemist which significantly speed up crafting of alchemical things and poisons. Likewise, an Alchemist has Alchemy for a bonus to the skill, Swift Alchemy and Instant Alchemy that also speeds up crafting time.
/cevah
We'll it says only the skill you choose counts for caster levels. It seems to me to be clearly saying you pick a single skill, so I couldn't take this with craft (weapons) chosen and make a magic necklace.
So the question is which craft (something) would give the most options with craft wondrous item? Clothing or jewelry seem like safe picks.
"..., You can create magic items using these feats, substituting your ranks in the chosen skill for your total caster level."
Craft() does not care about caster level. Make what you want with any skill you have."You must use the chosen skill for the check to create the item."
This refers to the DC to enchant it, not to craft it.
Mundane crafting is unaffected by Master Craftsman, Craft Arms and Armor, and Craft Wondrous Items. If you want to take ranks in more than one skill, do so. The spell Crafter's Fortune is your friend. [One day per level, +5 to a selected Craft.] Make what you want. That is why I suggested Craft(Alchemy) as the selected skill, as it is the only skill I know that can be significantly sped up. All other skills take the same amount of time for the same amount of value, which takes forever.
Magic crafting does not care which Craft() you pick, because it does not affect enchanting.
/cevah