Weeping Gemini

The best and most accessible alternative since it is craftable: ATK% helps reach her ATK target, plus plenty of Anomaly Proficiency. With this W-Engine, use an ATK% Disc 4.

The F2P pick and her best option after the signature: ATK% and a lot of Anomaly Proficiency at full stacks, which you'll hit often in her teams. Looking at full-team damage, it gets even closer to her signature than her personal numbers suggest.

A craftable pick that comes close to the S1 signature: ATK% plus a lot of Anomaly Proficiency, which makes Polarity Disorder stronger. It lacks Anomaly Mastery, so back-to-back Disorders are harder; apply 4 Anomalies before the Stun window and unload before the enemy recovers, since that's when the stacks are lost.

The best free option: a big Anomaly Proficiency boost whenever the squad applies an Anomaly, plus permanent ATK%. Not on par with the options above, but a reliable alternative.

The best F2P option (craftable), with ATK% and up to 192 Anomaly Proficiency. Polarized Assault also counts as inflicting an Anomaly, so Alice keeps full stacks easily. The only drawback is that the stacks reset when the target recovers from Stun.

The craftable option. Its Anomaly Proficiency can get very high and only expires when the target recovers from Stun, so it's usually full during burst. But Aria wants fast Stuns and cycles few Anomalies, so the stacks build slowly. It's best avoided in Stunner teams.

The best free option. It gives a big Anomaly Proficiency boost whenever the squad applies an Anomaly, plus permanent ATK% from its main stat. It's not on par with her signature, but it's a reliable alternative.

The best free option: a big Anomaly Proficiency boost whenever the squad applies an Anomaly, plus permanent ATK%. It can fall behind at high Stun counts, but it's much easier to use than Fusion Compiler.

Craftable and easy to max: ATK% and a large amount of Anomaly Proficiency whenever the team inflicts Anomalies. It performs nearly on par with the options above.

Craftable and the easiest to obtain: ATK% and a lot of Anomaly Proficiency. The high Proficiency shifts her damage toward Shatter and Frost Disorder, so focus on triggering as many Disorders as possible.

The craftable option: ATK% is useful because Promeia has no ATK bonus in her kit, and she applies Anomalies so fast that its Proficiency stacks ramp up early. The stacks reset whenever an enemy recovers from Stun, so it performs better in double-Anomaly or low-Stun teams.