This gives us a Present value of 16,500,000 EXP for the first level and 7,500,000 for the second and third levels. Theoretically, the Perpetuity Present Value of EXP gained by the sparing put should be ∞ but since we cannot divide by 0, I set the rate to 0.01%. Since there is no growth in the rate of EXP over time the discount rate should be close to 0.

Brutal 12-6 will always net you 68,283 EXP when taking 3 common Champions from 1 to 10.

This is because EXP earned now will not give you increased EXP earned in the future. My assumption here was that the Discount Rate, or interest rate on the energy earned, was as close to 0 as possible. I used a perpetuity calculation to determine the Present value of EXP based on the Actual EXP/Hr Gained From Purchase. I added in efficiency since we let our sparing pit go idol sometimes and assumed that we are truly only earning EXP 75% of the time, this gives us our Actual EXP/HR I have not unlocked Level 3 so I made the assumption it also only netted an additional 1,000 EXP/hr.

I Took The EXP/Hr we gain from each purchase level Meaning while at level 2 we do earn an average of 3,200 EXP/hr it is only 1,000 more than level one, so our purchase only netted us an additional 1,000 EXP/hr. I listed out the different levels of the sparing pit with their cost in terms of Diamonds and then using my factors from above, converted their cost in terms of EXP. I used this data to calculate my EXP/Energy, and then I used that to calculate my Energy/Diamond value per refill. This cost me 40 Energy and gained me 68,238 EXP. I ran until they all max out at level 10. I did this by running Brutal 12-6 with 3 Common Level 1's. I needed to find out how much EXP I was earning in terms of energy and what that value was in terms of Diamonds I was running this with Raid Card, but no additional EXP boost as a baseline. Please bear with me as I try to explain my process. Rather than just taking their answers at face value I have come up with an actual answer. I have googled it and most play players tend to lean towards it being a waste of gems. I am a new player and have been struggling to determine if the sparing pit was worth it.

Raid shadow legends wiki sparring pit