Here are some examples of Alchemists from Heroes 3:

It's a shame that we can't create specialists for Djinns, Rakshasas, Gargoyles, and Mercury =)
Good chances of getting primary skills in attack and defense.
Prone to Logistics and Education. They will often get Attack, Defense, and Mechanics. Yes, these are the "warrior" heroes of the silver cities =)
Magic is just for show, designed for buffs under light and debuffs under darkness. And also Knowledge for crafting minions. Let's see what comes of it:

The latest version is available here: https://drive.google.com/file/d/1yUaHSN2sNOZOiG2alHFdoWHlBrVtVORH/view?usp=sharing
Feedback is welcome =)