Competitive (High Investment)
As Stigmata and Echo can both rearrange their orbs, Echo's optimal spot is in the Blue slot of the team. Echo should avoid Yellow as it is best used by Rigor.
Echo acts as the starter of this team to set up the Amplifier Class passive while quickly closing the gap with a Yellow 3-Ping, simultaneously setting up Rigor’s QTE to benefit Stigmata. Echo should swap to Stigmata as soon as she has closed the gap. Superna Awakening Echo is necessary to use this rotation opener consistently.
Echo's SSS-Rank can potentially be obtained for free through the Tactical Assessment Manual (Battle Pass). SSS-Rank provides strong improvements to buffing potential, damage, and overall gameplay. Echo's Signature Weapon provides improvements to her buffs, damage output, and gameplay while significantly improving her team though access to Weapon Resonances and Weapon Harmonization.
As other slots are better used by other members, Stigmata takes the remaining position in the team.
Stigmata’s SS-Rank significantly increases her Signature Move's damage. SS3-Rank provides significant Energy gain, which can considerably increase DPS if utilized properly. Signature Weapon is very strongly recommended to quickly gain consistently high amounts of Stigmata Will stacks to maximize her Signature Move’s damage.
Optimal rotation for this composition makes use of Superna Awakening to allow Echo to begin combat with a guaranteed Yellow 3-Ping which she should use to start. As such, Rigor should be set on Yellow to allow for uninterrupted rotations while allowing Echo to trigger her QTE to further assist Stigmata. Superna Awakening Echo is necessary to use this rotation opener consistently. Without a Yellow 3-Ping, players should instead swap to Stigmata immediately.
Rigor's Leap should be considered a minimum investment for this team as it increases her DPS by a significant amount. Rigor should be at least SS-Rank in this composition, as the ability to reapply her Defense reduction debuff from off-field can greatly improve the team's potential output. SSS-Rank is not necessary, but can be potentially obtained for free through the Tactical Assessment Manual (Battle Pass). If accessible, it is highly recommended for the increase to her Defense reduction debuffs. Signature Weapon serves as another increase to Rigor's maximum Defense reduction and allows for Weapon Resonances.