gold, elixir, and dark elixir production and costs to upgrade buildings.
1 walls should be able to upgrade with elixer at lv 7 and recorces should be eased to obtain like faster production rates or more league bonus. Every time I get on coc i cant stand when you've been raided and bam it takes like 16 hours to gain what you lost by production rates. I never have enough gold or elixir to upgrade anything. Maybe cut some of the costs for upgrades and maybe the time as well. If you do decide to boost production don't increase upgrade costs