Lone Planetfarer

Core loop

• Her first Ultimate of the battle is free: it awakens Star Traveler and switches her to Planet Quaker form for 19s. In this form her Ultimate becomes Nihilation of Planets (125 SP, 20s CD, 1,500% ATK, Time-frozen Domain).
• In Planet Quaker form, Basic ATK and Weapon Skill fill her Intelligence (starts at 200, max 400). Tap Weapon, then mash or hold ATK to chain into the enhanced Basic ATK SEQ 3 and 4.
• With full Intelligence, hold ATK for her Combo ATK Celestial Rupture: Star Traveler smashes enemies for 2,000% ATK (invincible during the buildup, Time Fracture on hit). Her enhanced SEQ 4 stores up to 2 Abyssal Energy.

Astral Ring (Rite of Oblivion)

• Celestial Rupture consumes her Stellar Drain for 15 Intensity, plus 5 per Abyssal Energy stack (10 at SS); with her signature weapon, the first one each battle restores 15 more.
• As the leader, Stellar Outburst gives her 4 Quantum Mech Energy (Intelligence Unleashed): mash the special button for three mech punches, then Celestial Rupture. Her leader skill needs three Rite of Oblivion members for Elemental Breach and a stronger Ultimate: without them her damage drops a lot.

As a support

• Entering Stellar Outburst or casting Nihilation of Planets gives the team Omniscient Skyveil for 25s: enemies take 12% more Elemental and 9% more Physical DMG (15%/11% at S3), +10% Total DMG, and Elemental/Physical Breaker state (11.5% Elemental or 37% Physical Breach under World Star, Wheel of Destiny or Law of Ascension, 14%/45% at S1; 9% or 29% otherwise).
• Swap her in, consume Stellar Drain with Celestial Rupture, refresh Skyveil with her Ultimate or Outburst, then swap back. Her field time is a little longer than other supports.

Marisa Impact's Elysian Realm loop (Astral Ring Charging): Ultimate to enter Planet Quaker form, Weapon then spam Basic ATK until the meter is full, Combo ATK, Ultimate when available, repeat.