There needs to be a 2nd lab for dark troops and dark spells, and use the current lab for regular troops and spells. Right now you have separate barracks for dark troops and regular troops, and separate spell factories for dark spells and regular spells. So this completely makes sense. Make it available at th9 or th10. Once you get up to the higher levels it takes 2+ weeks to upgrade one troop. And with new spells and troops being added approximately every 6 months (give or take) it's taking a little too long to upgrade in the lab. I hope this actually gets read lol
Hello, and welcome to the forums! Please read the stickied threads at the top of this subforum, as they may provide guidance regarding your idea. However, the idea that you have suggested has been ruled out by Supercell developers for the time being, according to this sticky.
If you have any more questions or concerns, you are more than welcome to VM me on my profile, which is located here.