first of all, to use it you need 28 of all resources, secondly, it's cool when the dispersion of getting a full set is 28 of all resources in the best case and 154 of all resources in the worst case in a Conflux or Dungeon game?

In my opinion, the most accurate definition of the problem is an extreme dispersion; maybe we should try to reduce this particular parameter by limiting the range from above and below, i.e., exclude control spells from the spells that appear when building the corresponding guild level (or the 1st rebuild, specific values are not important at this stage) and set a maximum number of rebuilds before getting control, for example, rebuilt 4 times without result - on the 5th time you are guaranteed to get control. What do you think?