RTI Temp Level Challenge

Description
Get at least 100 temp levels for all RTI elements * challenge number.

This challenge is often referred to as TLC (Temp Level Challenge).

Unlock Condition
Have at least 100,000 permanent levels for all RTI elements.

Reward
Challenge Points: 25 Statistics Multi: 1.500 million

Increases the base multiplier for RTI temp leveling speed by 1% per challenge finished (not multiplied with the RTI > V100 multi).

What this means is: the leveling time for RTI Temp Levels, as shown in the Boost tooltip, is a large constant, divided by N, divided by the number of shadow clones assigned. N is calculated by adding your RTI challenge score (where points above 100 count double) and your number of TLC completions. For example, with an RTI score of 157 and with 20 TLC completions, N would be: $$ 100 + 57 \times 2 + 20 = 234 $$

Completions to Max
20

Recommended Stats
The more clones you have, the better. Having pets in RTI for each slot will help considerably. Having an RTI >100 for the first 10 challenges, and having an RTI >120 for the last few challenges if you want them done in 1-2 days (depends on clone count). Pets with decent CLs (>40) are good for speeding up leveling. Having additional RTI Slots unlocked can make this challenge less-active since you can slot more pets at once.

Strategy
Set the next at levels to the target score to see how long it will take (either spread clones or multiply time by 10). You can also do this outside of the challenge but do note if you try and work out later challenges in the series you might overestimate time needed slightly due to not having the reward from prior completions.

The following table shows the number of clones required to complete the given TLC challenge in 1 day without any pets assigned to RTI slots. (taken from https://w.atwiki.jp/clickeridle/pages/15.html#id_ba537824)

Using pets in RTI slots will speed up this challenge. If you lack slots (or available pets) a possible way to do this is putting all clones into one or more RTI elements and changing the pets as your clones work on the next RTI element. Using Book or Nothing is less stress, since you can change their class as needed. This does require you are actively playing to switch out classes as you level different elements.