Theorylytics

Frost vs Hydroid

Same Tank / Defense fantasy — which tank kit fits your squad and mission rota?

TL;DR — Quick Pick

Pick Frost if…

  • When Frost steps onto the battlefield, enemies experience a chill — that's the Frost pitch you want on the roster.
  • Hydroid's pitch (“Hydroid summons the power of the ocean depths”) isn't what you're missing — Snow Globe is.
  • Your builds lean status effects and Frost's passive extends that plan.

Pick Hydroid if…

  • You want the squad gap filled by Hydroid's vibe — Hydroid summons the power of the ocean depths.
  • You'd rather build around Plunder than live in Frost's Snow Globe loop.
  • Your builds lean status effects and Hydroid's passive extends that plan.
Verdict

Both fill the Tank / Defense lane. Lean Frost for status-duration amplification and Snow Globe; lean Hydroid for status-duration amplification and Plunder. Mission Usefulness is a wash — decide on kit feel and passive, not the rating table.

At a Glance

Frost
Stat
Hydroid
Tank / Defense
Role
Tank / Defense
VazarinVazarin
Aura
NaramonNaramon
Match the priority to your main ability
Mod Priority
Match the priority to your main ability
Freeze
Kit Opener
Tempest Barrage

Mission Usefulness

Mission
Frost
Hydroid
Steel Path Survival / Defense / Disruption
Excellent
Excellent
Mobile Defense / Excavation
Excellent
Excellent
Exterminate / Capture Speed Runs
Situational
Situational
Spy / Rescue / Nightmare
Weak
Weak
Open World / Bounties
Situational
Situational
Long-Range Gunplay / Eidolon-Style Content
Weak
Weak

When Each Shines

Frost

  • Snow Globe carries mid-mission casts; Avalanche is the density payoff.
  • Status-heavy weapons in hand — Frost's passive makes those procs earn their keep.
  • Frost shines on objective holds that need a frontliner who can also clear.

Hydroid

  • Plunder carries mid-mission casts; Tentacle Swarm is the density payoff.
  • Status-heavy weapons in hand — Hydroid's passive makes those procs earn their keep.
  • Hydroid shines on objective holds that need a frontliner who can also clear.

Mod Scaling Focus

Frost

Match the priority to your main ability — Strength or Duration first for most kits, then Efficiency, then Range.

STR
Raises damage and effect potency across Frost’s Strength-scaling abilities.
DUR
Extends channeled / timed effects — often comfort on Frost if the kit leans on buffs or zones.
RNG
Helps radius / targeting tools. Dump it if Frost is mostly self-buff or exalted weapons.
EFF
Keeps ability uptime comfortable, especially on longer Steel Path missions.

Hydroid

Match the priority to your main ability — Strength or Duration first for most kits, then Efficiency, then Range.

STR
Raises damage and effect potency across Hydroid’s Strength-scaling abilities.
DUR
Extends channeled / timed effects — often comfort on Hydroid if the kit leans on buffs or zones.
RNG
Helps radius / targeting tools. Dump it if Hydroid is mostly self-buff or exalted weapons.
EFF
Keeps ability uptime comfortable, especially on longer Steel Path missions.

Who Should You Pull?

Frost
Pull Frost if…
  • Status duration is how your weapons scale and Frost extends that plan for free.
  • Your favorite clear starts on Freeze and ends on Avalanche — Frost is built for that arc.
  • Hydroid's Plunder loop asks for a different muscle memory than you want to practice.
  • Vazarin on the aura slot matches the school you're already building weapons around.
  • Potato + Forma budget this month has Frost's name on it.
Frost Full Guide
Hydroid
Pull Hydroid if…
  • Status duration is how your weapons scale and Hydroid extends that plan for free.
  • Squad comps where someone has to own tile clear alone — Hydroid is the frame you trust for that job.
  • Frost can stay on the shelf; Hydroid is the one you'll actually Forma twice.
  • Even after Helminth, Tidal Surge and later abilities are still the reason Hydroid earned potato.
  • Your endgame loadout screen should show Hydroid before it shows another same-role experiment.
Hydroid Full Guide