Change the research slot count so that vip10 get 2 research slots and all hero camp buildings level 2 (if not already)
Vip15 get 3 research slots and all hero camp buildings level 3 (if not already)
Vip17 get 4 research slots and all hero camp buildings level 4(if not already)
Vip20 get 5 research slots and all hero camp buildings level 5(if not already)