Best 2 Sustain Units in Honkai: Star Rail 2026
Sustains are ranked by how much they keep the team alive AND how much they add to damage. Fu Xuan stands out by sharing damage and granting team CRIT; March 7th is the best free shield.
How We Rank These
Preservation units shield and taunt; Abundance units heal. For hypercarry teams, Fu Xuan's damage-share + team CRIT enables running with no healer. March 7th is the free default for new accounts.
Fu Xuan
Quantum Preservation who redirects team damage to herself and grants team-wide CRIT Rate. Enables aggressive no-healer cores and boosts the whole squad's damage.
Watch out: Limited unit; her value is concentrated in hypercarry teams.
March 7th
Free Ice shielder who shields the highest-aggro ally and can freeze. The default new-account sustain and pairs with any DPS.
Watch out: Lower ceiling than limited sustains; shield uptime needs her Skill managed.
Verdict
Frequently Asked Questions
Shield or heal — which is better?
For hypercarry teams, a shielder like Fu Xuan (who also buffs) is usually better because she enables no-healer play and adds damage. Healers shine in DoT/sustain-damage teams.
Can I skip a sustain?
Only with Fu Xuan's damage-share + a fast Bronya. Most accounts want at least one sustain; March 7th is free and sufficient early.