Torchlight: Infinite Mercenary Guide: Does Hiring Allies Double Enemy HP?

Hiring a mercenary in Torchlight: Infinite effectively doubles enemy health by triggering co-op party scaling in Netherrealm stages. If you are speed farming standard maps for currency and beacons, dismiss your mercenary. Running with an active companion without substantial damage amplification or defensive utility cuts your clear speed and leaves monsters alive long enough to deal lethal damage.

How Mercenary Health Scaling Works

Deploying a mercenary causes the game to treat your instance as a multi-player session. The moment you enter a Netherrealm stage or boss arena with a follower, base monster health increases by roughly 100%.

This health increase applies equally to all targets in the zone:

• Standard trash packs
• Rare and elite packs
• Stage bosses and pinnacle encounters

Monster damage output does not decrease to compensate for the expanded health pools. Because enemies survive longer, hazard exposure increases. Packs have more time to retaliate, drop ground degeneration pools, and swarm your hero. If your build relies on clearing packs in a single strike to stay safe, this penalty disrupts your momentum.

Solo vs. Mercenary Performance

A mercenary is an asset only if their offensive buffs double your effective damage output or their defensive utility prevents deaths during milestone progression.

To offset the doubled health pool, a companion must supply enough offensive value—such as resistance penetration, vulnerability debuffs, sealed auras, or guaranteed ailment application like Trauma or Ignite—to compensate for the extra durability. Budget or uninvested mercenaries rarely supply this degree of amplification.

When to Deploy or Dismiss Your Mercenary

Evaluate your immediate farming goal before deciding whether to bring a companion into a map.

Dismiss Your Mercenary

• Speed Farming Maps: Solo play is strictly superior when rushing Netherrealm maps for raw currency, embers, or Memory Echoes. Stopping to cast multiple rotations on standard packs reduces your hourly returns.
• Overkill and On-Kill Setups: Builds that rely on explosion mechanics or on-kill cascade effects require instant trash-pack kills to detonate surrounding elites. Doubled health pools disrupt these chains.
• Low-Investment Followers: An unequipped mercenary adds the full 100% monster health penalty while contributing negligible damage or aura support.

Keep Your Mercenary Active

• Milestone Progression Gates: When attempting challenging progression bosses or push tiers where survival is your primary failure point, companion taunts and damage-absorbing barriers justify the extended fight duration.
• Dedicated Aura Buffers: If your mercenary setup runs high-tier sealed supportive auras that drastically boost your hero's primary damage archetype, the companion acts as an aura carrier that offsets the party penalty.

How to Test Your Farming Efficiency

Run a quick benchmark test to determine whether your mercenary is currently hurting your map clear rate:

1. Enter your target Netherrealm Timemark stage solo and measure your average time to eliminate an elite pack and the stage boss.
2. Clear an identical map tier with your mercenary deployed.
3. Check the clear duration: if your completion time increases noticeably and your character is not struggling to survive, dismiss the mercenary for routine map grinding.