Calculate the likelihood of obtaining a Luma Temtem this week. At the time of writing, your odds of obtaining a Luma Temtem are 1 in 10,000. Even with multipliers, you are still facing an uphill battle.
Here are some methods that can help you increase your odds but nothing will guarantee a Luma.
You can receive up to 3 Tem radars per week as a reward for defeating Dojo masters in a rematch. These radars allow you to encounter a specific evolutionary line. You will need to defeat or capture the Tems within the evolutionary line to keep the chain going.
Once you defeat 200 Tems, the Luma multiplier will be at 5x and then become 10x when you defeat 300. The radar will break at 400 and you won't be able to attempt chaining again until you get another radar/
Saipark multipliers seldom go over 4x but they do provide you with a week's worth of encounters. Given the univerally low encounter rate, Luma hunting is an extremely boring and tedious process. However, it is worth it if you want a Tem with an awesome color scheme.