Largely based on a run by rent_:

Day 2

• collect 3 Iron Ores and go to B3
• break down Iron Ores
• make Novice Knife
• break down Novice Knife
• make Novice Drill
• equip Novice Drill
• break Chaves's sword

Day 3

• make Chaves's sword
• decide to decline after meeting Sanary
• go to B6 and pick up two Bandages
• equip Chaves's sword (over Novice Drill) and Enchant Spark
• fight Varil
• sell Bandages and buy Mineral Ring
• equip Mineral Ring, Healing Spell, Chain Spark
• fight Kenon

Day 4

• if Zantek doesn't have Astral Guard, get into an encounter
• equip Novice Drill in 2nd slot, Astral Guard
• get 4 Martial Ore on B8
• fight Yasha Spider
• heal on bed
• unequip Novice Drill
• fight Razzy

Day 5

• unequip Chaves's Sword
• break down Martial Ores
• craft Ladle
• get Core Parts on B18
• break down Core Parts
• make Gladius
• break down Gladius
• equip Chaves's Sword
• fight Ariel and Mariel

Day 6

• make Zantetsu Blade
• equip Zantetsu Blade in 2nd slot (and maybe Novice Drill)
• get Conductor Rod on B18 stairs
• fight Heavy Metal
• fight Soldier

Day 7

• break down Conductor Rod
• make two Zantetsu Blades
• buy Gold Ring
• equip Gold Ring, 2x Zantetsu
• fight Giant Serpent
• fight Giant Crab
• buy at least 3 Amulets

Day 8

• fight Ureksa
• fight Kirin
• equip Magatama Necklace

Day 9

• fight Ureksa

Day 10

• fight Soldier
• fight Lubert
• fight Parista
• nighttime talk to Sakuro

Day 11

• unequip two Zantetsus
• fight Sanary
• equip Ladle and Zantetsu Blade (maybe two), use Amulet
• make Knuckles with Kuhrya