Light Sin needs help

[yoM]

The gear is : https://imgur.com/a/Ezr6OgM

I did roughly 415K to 420K at F12 but the Lighting rod ratio is low at around 1.55. What do you guys think is the best DPS I can get with such gear? Also I have enough jewels to either get King Gloves 10 or wait saving them for the Necklace. What do you guys think I should do? I am pretty much F2P so I want to spend every mat I have wisely. Thank you in advance.

[yoM]

I forgot to say that I do not have H.M. Shadow Slash. I know I suck at PvP but I blame it to mediocre PC and unstable internet :P