I was thinking of doing that on pc and mobile but for some reason i get the lottery screen on my phone with VPN.. before I didn't have that problem. Now that you mention second browser i may actually do triple combo at once
Yeah for now I'll keep them as a backup in case i won't get what i want.
300 jewels is only one gacha unfortunately and the chance is like 3% (ridiculous). I prefer getting the right team first and then spending rest of those jewels on gacha again