- Do ONLY the hardest Bounty each week (will nets you 300 exp total).
- Complete every weekly requests (nets you 120 exp total).
- Exploring both Liyue and Monstadt (nets you 300 exp for completing it to 60%).
- Doing Archon & Side quests (each Archon quests gives you 100 exp, while side quests gives 20 exp).
The rest is by luck, since the City Quest part is mostly based on RNG from the daily adventure quests. So you need to maximize the weekly Bounty instead, by choosing the 100 exp bounty 3 times.