New idea - Blacksmith

Similar to the laboratory, it is a building that can build certain equips for the troops; both regular and dark elixer troops. You can upgrade each equip inside of the laboratory. Each equip has 5 different levels. The price to add the equip increases with each upgrade and varies from troop to troop.
Requirements: Town Hall lvl7; Level 8 barracks
Cost: 1,500,000 gold
Build time: 5 days
Examples:
Shield for the barbarian, has a starting hp of 10. They have the shield to soak up a few hits and breaks after loosing all of its hp. Its hp goes up by 2 for each upgrade.
Special arrows for the archers, they get 5 to start with and do twice as much damage as they normally do. They get 1 more arrow for each time you upgrade them.
Goblins have a vacume that sucks up coims and elixer for them. It'll suck up 2000 gold and elixer before going away. The goblins still use their own hands while its there.

Let me know what you think should be added or taken away

The troop is fine the way it is. This would make the game imbalance.

Thanks for the feedback

This is not a bad idea. I think it's a good idea to have some customization on your troops

I think the only customization should go to heroes. We already upgrade troops in lab. What's the point of upgrading them again in other ways that essentially do the same thing, dmg, health, etc.