Support

Aggro Down (Cap 50%): Reduces aggro gained from healing or attacking. This Gem makes Arts Stealth and similar Gems obsolete by decreasing all aggro gained by up to 50%, which is useful for characters with high burst damage. It can only be equipped to weapon slots. Characters like Shulk (due to Back Slash), Sharla (healing Arts), and Melia (less so, due to DoTs) benefit from this.

Aggro Up (Cap 50%): Increases aggro gained from healing or attacking. This Gem helps tanks maintain aggro, especially in the earlier stages of the game. It increases all aggro gained by up to 50% and can only be equipped to weapon slots. It's ideal for tanks like Reyn and Dunban, and Riki when used as a tank in an Ether-focused party.

Arts Heal (Cap 150): Using Arts recovers HP. This Gem is the Arts equivalent of HP Steal and heals the character for a set amount of HP when they use Arts. However, the healing is generally insufficient to warrant a slot. . No specific characters are recommended.

Aura Heal (Cap 150): x HP recovered every 2 seconds while an Aura is active. This Gem is the Aura equivalent of Arts Heal. It heals the character for a set amount of HP every 2 seconds when an Aura is active. Similar to Arts Heal, the healing is usually not enough to justify using a slot. It can only be equipped to armour slots. .

Buff Time Plus (Cap 150%): Extends gem buff effects by x%. This Gem extends the duration of certain Gem buffs, but only impacts Physical and Ether Protect Gems, which are themselves unremarkable. . .

Damage Heal (Cap 200): x% chance of recovering x HP when attacked. This Gem heals the character for a set amount of HP when they are hit by an attack. Like other healing Gems based on actions, the amount healed is often not significant enough to warrant a slot. . .

Daze Plus (Cap 100%): Extends the time an enemy will suffer Daze by x%. This Gem increases the duration an enemy remains in the Daze status. When paired with Daze Up, it can allow for significant damage dealing during the Daze period. However, Topple is generally easier to achieve and more effective. . Best used on characters in a Topple Lock party, such as Reyn and Shulk, if Daze is prioritized over Topple.

Daze Tension (Cap 25): Attacking a Dazed enemy raises tension by x. This Gem increases Tension by a set amount when attacking a Dazed enemy. While potentially useful in a Topple Lock party, various skills offer better ways to raise Tension, making this Gem largely obsolete. . .

Debuff Plus (Cap 150%): Extends gem debuff effect time by x%. This Gem extends the duration of Debuffs based on other Gems set (like Poison Plus). It requires two Gem slots to be effective and skills often provide better alternatives. . While generally not recommended, Melia benefits the most due to extending her Damage over Time (DoT) effects.

Haste (Cap 50%): Increases the speed of auto-attacks by x%. This is considered one of the best Gems in the game, especially for physical attackers. It speeds up auto-attacks and reduces the downtime between AI-controlled characters' Arts. Auto-attacks are crucial for filling Talent Gauges, making this Gem highly desirable for almost any attacking character. . Highly recommended for all physical attackers, Shulk (for faster Talent Gauge fill), Dunban (for increased aggro), and Seven (when paired with Double Attack Gems and specific skills for high damage). It should be one of the first Gems acquired.

Heat Sink (Cap 100%): Reduces Ether Rifle overheating by x%. This unique Gem can only be equipped by Sharla. It reduces her Ether Rifle's overheating by a set percentage, which is very useful when Sharla is in the party. The main drawback is its rarity. It significantly improves Sharla's effectiveness.

Initial Tension (Cap 100%): Increases tension by x when battle starts. This Gem increases a character's starting Tension at the beginning of a battle. However, numerous skills provide better and more consistent ways to raise Tension, making this Gem largely unnecessary. . While generally not recommended, Seven can benefit slightly as it helps her use Final Cross more easily.

Night Vision (Cap 50%): Increases accuracy of physical attacks at night by x%. This Gem is crucial for difficult encounters, especially against superbosses. It increases the accuracy of Physical Attacks at night, which is vital when facing enemies where your level is significantly lower, mitigating the accuracy penalty. It should be capped on any character using auto-attacks when fighting superbosses.

Recovery Up (Cap 50%): Increases HP restored when being healed by x%. This Gem increases the amount of HP recovered from all healing sources, including Arts and Skills. It requires careful setup to be truly useful and can only be equipped to armour slots. Reyn is the best character to equip this Gem on, with Dunban as a secondary option, as tanks are expected to take damage.

Revival HP Up (Cap 30%): Increases amount of HP recovered when revived by x%. This Gem increases the HP recovered upon revival. While it can be useful, it indicates a need to improve performance, as avoiding revivals is preferable. Skills often provide better alternatives. . .

Talent Boost (Cap 12): Auto-attack damage halved but fills Talent Gauge by x. This situational Gem is highly effective in the late game. It allows the Talent Gauge to fill much faster (e.g., four hits for Shulk at cap) at the cost of halving auto-attack damage. . Shulk is the primary user, especially in the late game, to build his gauge quickly. It also allows Melia to build her gauge without needing to discharge her Summons.

Tension Swing (Cap 50%): Shrinks te...