Pubg lags on mi 5s . ( Using mokee rom )

Can you guys add any type feature or any changes to the current rom that can allow to run
pubg at 60 fps stable ? . Currently I am using mokee rom and playing pubg at smooth graphics , 60 fps. Its able to reach 60 fps but it drops frames randomly. This issue can fixed if you add feature that enable phone to reach its highest performance with consistency .