"Всем - значит ничем."В том то и дело что мм6 - отличается всем от мм7 и 8.
Reimplementing old skills behavior isn't worth it to me. As for class skill allocation - use your custom "Data/Tables/Class Skills.txt". There's "Data/Tables/Teacher topics.txt" which may let you set required skill value for mastery upgrade but I never tested it.
Reimplementing old resistance system isn't worth to me either. But it should be more or less easy, right, Tomsod?
Old spell learning is doable - I made it possible in Revamp with "Data/Tables/SpellLearning.txt".
If we speak about items - it is doable. Both preferred weights and total restriction (weight = 0) for continents. (Work in progress actually.)Isolating the MM6 resources for a total conversion of MM8