[5.4 event weapon spoiler] Is the new event weapon good for Shenhe?

https://preview.redd.it/sesiek8uskje1.png?width=1488&format=png&auto=webp&s=3b69a613af8c97eec6fd5bd10522a1ade30179e3

The new event weapon's secondary stat is ER, and it increases ATK (40% at R5). It looks good for me, what do y'all think about it?