What server is the best option?

Hi everyone, I used to play in EUW servers for quite a long time, today, I just moved to Korea as an exchange student, and I can't play on the Korean servers yet because I need a korean social security number. I will recieve mine in a week to 10 days time. I still want to play until then, so I wanted to know what servers will have the smallest ping for me here in south korea. Ping to euw is around 280-290 ping in russia is 280-290 ping in NA is 180-190 I didn't try the others yet. thank you in advance for your answers.
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