RTI Temp Level Challenge

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

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 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 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)

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.

An RTI challenge score of P.Baal v100 and around 97.5 million shadow clones working on RTI should take complete the last within 2 days. A table in this Japanese wiki gives clone counts needed for one day completions assuming an RTI challenge score of 100 or 140.

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 RTI element and using a pet with the AllClasses ability such as evolved book. This does require you are actively playing to switch out classes as you level different elements.