STS2 Act 3 Strategy Guide

Act 3 Overview

Act 3 is the final stretch. Everything you built so far is on trial. Enemies hit harder, and the boss is the real test.

Map Routing Basics

Route Planning

• Prioritize Rest Sites: HP management matters most before the boss
• Elites: Great Relics on offer, but the risk peaks here too
• Shops: Last chance for card removal and Relic shopping
• Normal fights: A low-risk route that conserves HP is valid

Final Deck Tuning

What to Do

• Do one last pass of removals: Cut any leftover Strikes and Defends
• Upgrade your key cards: Reinforce the core damage and defense pieces
• Stockpile potions: Bring two to three into the boss fight

What to Avoid

• Adding new cards that do not match the deck's concept
• Pivoting to a new build direction (it is too late)
• Taking unnecessary risks that Burn HP

Boss Strategy

Shared Points

• Memorize the boss's move patterns: Repetition teaches you the reads
• Do not hoard potions: Saving them for a death is pointless
• The first few turns are crucial: Play Powers and stack buffs
• HP management: If a second fight is coming, minimize damage in the first

Damage Check

• Can you actually push the boss's HP to zero?
• Scaling (Strength, Poison, Orbs, etc.) lets you win long fights
• Balance burst damage against scaling

Defense Check

• Do you have enough Block to eat the big moves?
• Are you ready for debuffs and Artifact layers?
• Can you survive damage across multiple turns?

Run Review

Whether you won or lost, reviewing these points will make you better.

• Which cards pulled their weight, and which did not
• Which Relics were strong or Weak
• Were your map choices appropriate?
• Revisit the card picks you hesitated on

This article is updated as STS2 patches ship.