Change way boosting barracks are currently.
Currently you need to use an all or none method of boosting your barracks. I suggest that they partition the amount of gems to boost and separate the dark barracks and regular barracks.
For example.
- 5 gems increase speed by 1.5 times
- 10 gems increases speed by 2 times
- 15 gems increases speed by 2.5
- 20 gems ... etc. up to 30 gems
And for dark barraks you get a separate boosting system. As we have many people who raid without using the dark barraks as troops. So spending 30 gems would not help those raiders.