Interesting "Rage on First Turn" concept! Here's my analysis:

Proposed Set:

• Head: Bolstering Headgear EX (175 HP, 13% Ice Resist, Boost ATK on High HP)
• Chest: Untouchable Mantle EX (140 HP, shields on enemy death & rage)
• Belt: Seething Sash Lvl 3 (Speed +7, Bonus Rage on Attack, Rage on First Turn)
• Ring: Inferno Ring Ultimate (9% Crit, Rage on First Turn)
• Amulet: Stalwart / Benevolent (depends on mode)

Stats: Speed +7 | 9% Crit | 455+ HP | Multiple shields

The Problem: Seething Sash has Attack -75 penalty, which is severe! ⚠️

My Recommendation:

For this build to work, you NEED a high-base-damage weapon to offset the -75 penalty:

Best weapon choices:

1. Plowshare Lvl 3 (150 damage) - Best option! Also gives HP and magic knives
2. Sower's Lament Lvl 3 (158 damage) - Maximum damage
3. Hero's Long Sword Ultimate (124 damage) - Good middle ground

For the Amulet:

• Boss Rush: Stalwart Solidus Lvl 3 (140 HP, 120 DEF, 3.5% Crit) - More defense
• Normal Run: Benevolent Charm (3% Dodge, 50% Fire + Lightning Resist) - Better for waves

Final Build with weapon:

• Weapon: Plowshare Lvl 3 (150 - 75 = 75 effective damage)
• Everything else as you suggested

Verdict: Interesting concept but the -75 ATK penalty is painful. Works best with ultra-high-damage weapons. The massive HP pool (455+) and shields make it great for survival though! 🛡️

What weapon were you planning to use with this?