Recommended Progression Team

This is my standard progression team consisting of Sia, Patricia, Itus, Mea, Rayhou.
The concept here is for Mea to charge her Ultimate first, mash click it manually even when using Auto (since there is a minor delay on auto-battle skill use) to Fear the enemy and prevent an early team wipe, which should give enough time for Itus's Blossom Ultimate to be used, and usually shortly after the Threat Analysis AoE Heal S-Trigger.
After that Patricia, Mea, and Rayhou Ultimates will usually come back up around the same time, and finally Sia. As before, on difficult content where survivability is an issue, always prioritize mashing Mea's Ultimate when it comes up (Fear), then Rayhou (DMG Immunity), and finally Patricia (Freeze CC).
Dogfight Formation (+DEF +Single Target RES) is your general bread and butter when attempting to clear content when under leveled. Without it, later on, enemy DPS is high enough to wipe your team before anyone can get off an Ultimate. On certain AoE heavy battles, you may need to switch to Bunker Formation (+DEF +AOE RES), but otherwise this formation usually falls short of the Single Target RES which basic attacks also fall under.
Depending on the enemy formation and element, you'll need to occasional shift the order of the front-line to ensure nobody dies before they can use their ultimate the first time. Most importantly Mea needs to survive. Shift Mea to the backline if surviving in any position in the front is not possible. Very rarely, the backline may be to be shifted around a bit as well, since it can sometime influence the flow of battle and enemy targeting.
Bosses are another story, and usually require specialized team setups to counter their mechanics. Shale (ATK buff, DEF Down, Heal, CC) and Hallona (Heal, Buffing Patricia DPS) are the most frequently used swaps, so make sure to raise them as well. While less frequently, Elina (Heal or ATK/DEF Down) or Erica (DoT Damage) were used. On Bosses, Patricia will usually also use her Blossom Ultimate, since Bosses are almost always CC immune. If you get stuck on a boss, befriending someone with a strong LR5 Sia to use as a mercenary is often the easiest solution, though not always possible. The alternative being to just fail and wait until the next day, since the game gradually weakens battles you fail at.
As of 2024-11-08 as F2P, team has allowed me to reach Sector 15-30 and Data Tower 140, currently 3rd placed on my server. I also ended up 1st in progression every round of the 5 day progression event. Noteworthy, that I didn't raise my Sia to LR until Sector 15, so that isn't required to make this team work. At the very least, you'll likely want Sia, Patricia, Itus to be UR minimum, so they can equip a full set of gear.
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