Perhaps all duel levels should also be set to 150 or equal to the game level. This could be done again with a potion from Waupee or John... implement. That way, everyone has the same chances at the start of the new achievements. There are enough differences due to upgraded weapons or winning weapons of the events.
Achievements are also not always supposed to be quickly attainable, but some numbers like 10,000 duels seem too fantastic to me. The numbers should be adjusted again, perhaps an average value for the best duelists over a 5-year period. There is not only the beta, we have many worlds and here the supporters of all countries can enthusiastically support you, dear aL35ul.