Talk:Assassin/@comment-104.231.175.21-20180212035420/@comment-4802891-20180212045109

There's no such thing as "best", it depends mostly on what you need, so here's a quick breakdown from someone who plays casually:

Jing Ke is a "base Assassin", her role is to generate stars and use them to deal high damage. She can be a good support, but her kit makes it clear she is supposed to deal the pain. She is at her strongest in Quick teams, obviously (which isn't saying much, as early-game Quick Servants are self-sufficient)

Dr. Jekyll is hardly an Assassin, he is more of a Berserker. His kit as an Assassin is pitiful and your goal with him is to switch to Hyde as fast as possible. Even his support-oriented Voice of Panic is only good as Hyde, so you can't even keep him as an Assassin for that.

Hundred-Faced Hassan is a multipurpose offensive Assassin. She can generate stars, she has 2 survival tools and a Card buff, making her handy in more than one team composition. However, since her NP buff, she is at her best in Arts teams.

Fuuma Kotarou is "base Assassin ++". While his damage is pathetic, he can generate a great amount of stars for his team to use. He is however not geared towards critical hits but more debuffs that would make the enemies' options weaker, like reducing their attack, critical chances and skills altogether. He also shas a handy target Evasion, which is great.

Hassan of Serenity is a stall support Assassin. She can reduce an enemy's NP gauge, but also lock their NP and skills with her own, giving you multiple options to avoid it. With the latest upgrade to her skillset, she is now a firm Poison support, being a good partner for someone like Robin, and a great match for Shuten or Semiramis.

There. Pick who you need the most!