Changing hero specializations within a single map.

Hello everyone. I would like to change the values and formulas of specializations for some heroes on a map level.

For example:
1) Dugald - change the attack and defense increase for archers for every 2 hero levels.

2) Wingael - increase initiative by 0.5% per hero level.

3) Jalib - spell reflection chance of 40+1% per level.

How can this be done? I read in other topics that changing specializations is done in the exe file, but for the entire client. How can this be done on a map level?