Succubus Fiend Dress is crafted with Tailoring in Mabinogi (clothes). This page lists everything needed to make it, checked against the game as it exists today. The interactive planner lives in the Tailoring Companion.
How to get the sewing pattern
The sewing pattern is rank 1 and survives 30 uses; every crafting attempt spends one use.
Rabbie Advanced Dead-End Chest: Run Rabbie Advanced and open the hallway dead-end chests for a chance at Succubus Fiend sewing patterns.. Enter with a Rabbie Advanced Fomor Pass at the Rabbie Dungeon altar.
Materials
Expect about 10 attempts per finished item (10% average progress per attempt). Per-attempt materials are consumed on every attempt; finishing materials once per item.
Each attempt uses
10× Finest Fabric — weaving on a loom, higher rank
10× Finest Silk — weaving on a loom, higher rank
5× Finest Leather Strap — weaving rank 3-1 on a spinning wheel
Finishing (once per item)
1× Finest Finishing Thread — Buy directly from any general goods NPC shop.
1× Childlike Pink Perfume — Drops from Succubus Fiend in Phantasm difficulty.