These are the items you need for the lv4 production skills (you need lv50 to get the quest!):
Tailor:
**The Curor Rerabrace
**Photic Stream Leg Harness
**Rancor Soul Robe
10 Fine Timber
Jeweler:
**Dragon Scale Necklace
**BillowView Pendent
**Anthelion Ring
10 Whetstone
Blacksmith:
**Serratooth DualSabers
**VioletFalcon Bow
**Evilbeaker Flagstaff
10 Finesmelt Steel
And these for lv6 production skill (you need to be lv80!):
Blacksmith:
1.Quest
**Blink Slay Edge
**Phoenix Wing Mace
**SonicSlam Hammer
2.Quest
**TranquilShine
**Exorcism FlagStaff
Tailor :
1.Quest
**Occultism Battle Armor
**Foreworld Sandal
**NineFates Legharness
2.Quest
**Light Conceal Cloak (its a lv 57 manteau, you can craft it for example in ADC)
**Scud Gulf
Jeweller:
1.Quest
**Dawdler Waist Adorn
**Glitter Necklace
**Astral Submerge Ring
2.Quest
**Minor Anode Necklace
*Ring of Zenithal Break (its only 1*, but it need stats on it like con or int, mag def didnt work for me)
It saves money when you make the items already while lvling your skill from lv3->4/ lv5->6. To lvl all skills to lv 7 takes a few hours, depending on how much luck you have in making 2** items xD
The lv8 skillbooks drop in high lvl FBs as far as i know (correct me if im wrong)