Talk:Hassan of the Serenity/@comment-124.106.251.245-20160926092901/@comment-181.130.139.228-20161002170921

They fill different niches. Summer  scathach is GREAT to deal with rider since she has the best Assasin AoE NP (others are Fuumas which doesnt hit hard and isnt used for that but for being great stars generator, Phantom which is meh and Shuten which has a great NP as well but is more debuff oriented). She can also generate good ammount of stars and NP bar with crits.

Serenity is, IMHO a Shiki lite (shiki still have better Stars generation tho). Both are able to insta kill, both have ST NP. Points to have into account in favor of Serenity is that she can stall enemies NP, and her NP if used with her third skill can Insta kill, and if it doesnt then then target will be heavily debuffed. While shiki has more raw damage and evasion skill (which also increase crit dmg).

So yes, both  scathach and Serenity fulfill different roles,  scathach to AoE and kill waves of rider mobs, and Serentiy for Debuff, insta kill and ST (bosses). Tho i think Shiki is a better choice, if you dont have her Serenity can make for a good replacement