Attacker jewels ?

by JunNu posted Sep 02, 2018
Which jewels should I get for attacker? Currently I have Windblade and Heidi 5*, one uses attack jewel and other uses critical. What is your thought on speed jewel then? It gives +1.72 in speed which can reach 11 spoed if I 5* my hermes. Is speed jewel the most worth it?