Fastest Way to get Stones? need alot jellow stones??

Cann u tell me a hint for fast getting Yellow Stones pls or all other Stones.

 

im in beginning of last Difficult

 

lvl98

 

Darl cave lvl53

have around

31.000.000 dmg

 

56.000.000 ar

 

any known inis oder doung. for fast getting stones?