How to lvl up fast?

Hi guys, I really want to reach lvl 30 ASAP, but i dont know what game mode is the best to achieve this the fastest. I'm not planning on using RP to buy xp boosts. I've heard twisted treeline is the best gamemode but at what time stamp should I end, like should I end at minute 7 or wait till minute 15? Thanks in advance, SR {{sticker:katarina-love}}
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