You would need to use other mods like Reward Soldier Classes by lordabizi. Since Amalgamation builds classes from every possible spec combination, that would be a monumental task since you'd have to declare each and every of these classes to be reward only / First Time only.
The only other option would be to simply block certain specs to make the Supersoldiers Restored classes rarer. You can do that using the Spec Exclusions Config from this mod.

How can I block these class from showing up as promotions? I want to get them only via soldier rewards and CI.

With this mod I can get multiple N7 engineer. Is there a way I can force the game to only give me 1 N7 engineer? And stop these class from showing up when I got 1 copy of each like how supersoldier restored operate?

Thanks

Thanks for the heads-up! I fixed the config and updated the mod.

Hello, thanks for this importation ! :D
I just wish to warn you that the Ninja is actually bugged because of missing syntaxes.
I opened a subject for those interested to make it work until you update the mod. :)

Dude you read my mind. You're a boss famm!!!

This is exactly what i was hoping for thanks for you're time on making this man !

Sure, good luck with your first mod!
Since I made the specs for the original Supersoldiers mod, I kinda felt obligated to do Supersoldiers Restored as well. I always wanted to see a nerfed version of the old specs and toned down many of the stats in my local configs, so seeing Supersoldiers Restored was quite exciting for me.
This mod still needs a bunch of testing, so there will be changes further down the line for sure. Like with most of my specs, I try to stay true to the original class as best I can. I'm very interested to see how your approach will differ from mine.

Great work Matt!
I've been using a local version of my own that I made for my current Earth-13 stream run since early March and according to modder viewers, it is quite different to yours. I was planning on releasing it as well after I tested it enough and I was fully happy with it.

Are you okay with me releasing it to workshop? I don't want to risk stepping on any toes for my first ever released mod, so I wanted to check with you first