F2P Guide

1: Reasoning: She gives up to 45% ATK to the highest ATK unit in the party. In parties that lack multiple DPS options (most F2P forever, spenders early on) she can greatly enhance your DPS by buffing your strongest DPS. Nothing in her kit requires stars, only levels. Her buffs and heals are just as effective at all star levels as they are at the lowest star levels, all that improves is her survivability (and dmg which barely matters).

2: OR  (Note: Jill not available yet to Steam players) (Note2: Meiyueh and Jill require stars to reach their full dmg dealing potential, while Jihkuang does not. Building Jihkuang first to around 9-star is highly recommended (takes 6-7 months). Reasoning: We generally say "Meiyueh is hotter, Jill does more damage." This is not to say Meiyueh does not deal damage. She attacks the lowest DEF party member on the opposing team, so she is valuable for prioritizing and removing the softest target. Meiyueh also has an up to 80% chance to stealth herself each turn, making her untargetable by single target attacks/effects. This partially makes up for the fact that most likely F2P will have a low-star Meiyueh forever. Meiyueh synergizes with  and 's weapon once it reaches +20 or higher. Meiyueh has paper-thin HP and dies easily to AoE or single target effects that get through her stealth, and she can be easily countered by placing a tank with low PDEF (usually from low star level) as a target for Mei to get stuck on. When on the offensive you can choose to run her or not depending on the enemy's composition.

Reasoning: Jill typically deals more overall damage than Meiyueh. Her normal attack has a random chance of dealing increasingly higher number of attacks, with the potential to just 1-shot her target. Lower stars will mean it will take greater RNG to do so. Her ultimate is also very useful, dispelling up to 3 strengthen effects on the enemy party (things like ATK buffs, or Huaxi's CDMG passive buff) and it hits all 5 targets of the enemy party. Jill synergizes with other Rangers, like  and  because she receives and benefits greatly from all of their buffs. Jill attacks random targets rather than predictable ones, which is both good and bad, but her primary weakness is the lack of any self-protection measures, so a low-star Jill may be a frail glass cannon.

Runners up: Reasoning: She is used in the F2P and most other compositions for Tiger boss (but only a 5* copy is required) but won't be very useful until she reaches around 9-star. She splits damage across a team, which is a useful and advanced mechanic, but tends not to be used until end-game. Reasoning: Not currently used in any bosses. She makes a strong off-tank (tank who supports another tank) but she won't be very useful until around 9-star with heavy investment. A powerful unit, but when lacking HP may not be able to stand her ground in the toughest fights without high stars.