Lena

Fast Farmer

In 2018 the farmers had a skill ratio of 0.5~1.05 with 1200 attack. Lena only has a 951 attack, but has a ratio of 1, up to 1.3 with mola, supported by her S2 passive. This makes her AoE damage phenomenal, it is consistent due to the Cooldown reset on a kill, and a low base attack can be used as an excuse to be ok with using flat attack substats. Lastly, a farmer should be clearing fast in real-time as well as the game time. Lena's S3 does not have animation and is a simple uppercut animation, being fast as Arbiter Vildred's S3.

Easy Gearing

Lena's 50% crit chance passive puts her base crit chance at 65% and is worth basically a crit chance necklace. This allows her building to be super easy, where it is harder to hit a 100% crit rate. This alone makes up for her low base attack stat.

CR manipulation

Like Lorina, Lena's S1 has a 20% self CR boost and S3 has a 20% AoE CR push. This makes up her average speed to match the fast thieves and make the enemy act less.

Easy to use

Many DPS heroes are not allowed to build a high speed, otherwise, risk attacking without an attack buff. Lena brings her attack buff on her S3, allowing her to be fast and still have a stable damage output. Luna has 30% attack and crit chance? Lena has 50%.

Low-balanced stat

Being a 3 star is already a penalty in end game talk, and Lena ended up with the Libra zodiac as a warrior, which is what Rikoris is. If Lena was a 5 star, she would have been lifting weights like Luna, who is also a Libra warrior.

Somewhat low single target damage

Compared to the most single target DPS, especially Lorina, Lena will be lacking the damage output. She can almost match them, but there is a limit, especially with Lena's soul burn not helping it at all.

Ice element

This is not a problem, if not an advantage for PvP. But as a PvE Farmer, Lena does require another farmer just for the Earth-type enemies.