Changing a hero’s specialization and skills.

then you need to look in data.pak

Maahir is located in \MapObjects\Academy\Maahir.(AdvMapHeroShared).xdb
Orlando is in \MapObjects\Inferno\Orlando.(AdvMapHeroShared).xdb

and just in case, Orlando the human is in \MapObjects\Haven\RedHeaven07_Orlando.(AdvMapHeroShared).xdb

you will need to extract the files from data.pak and put them into the map or mod, or into the campaign, and then make changes to them.