Engineers: While turret does seem cool and op for combat, but its too slow to build, and Im not sure if it even deals any real damage. Unless it stops working after a specific amount of time, as I believe it does, it would be somewhat good asa trap or town defense, but anyone with anything inside the head should easily be able to not die to Turrets.
Scribes: Most of Scribe skills are just utility skills used in combat classes, but without much combat use honestly. The only ones I can see useful in a fight are SafefallOther and Dispel. SafefallOther can save a single target from falldamage (according to wiki), and unless you can use it on yourself, I cant think of any moments where its useful. And Dispel, I havent really seen the skill used even by the combat classes that have it, which makes me doubt if it even works. If it does, its useful, but is it really worth it to go Scribe just for a single skill that you get at lv 40?
Enchanter: The fact that you can enchant items isnt enouugh combat related imo. In my eyes, its easier to just buy enchanted items if they even are needed, than go Enchanter and mine more every time you enchant something. Not to mention that Enchanter only has 2 skills, which just do the opposite thing from the other skill.
Miner: TNT honestly shouldnt be considered a combat skill in any way. It takes somewhere between 10 and 20 seconds for it to detonate, and unless you either are an idiot who walks to where the TNT was, thinking it doesnt work, or just dont know the TNT was even made, it wont hit you. Even if it does hit you, its not much use unless it could kill you in one hit. Havent tested TNT on lower hp classes, but from a try I know that it isnt enough to kill a master Samurai. The only time where I see it useful is as a trap around a town, and honestly even a pitfall trap is more useful and less obvious. And before anyone comes saying that "TNT will break regioned blocks so its useful", think about how long ago it was announced it would do that.
The point being, profession classes dont need skills that are useful in combat, and the current ones arent really any use in combat, with the exception of Scribe's Dispel, which Im not really sure about either.