As for you dealing too much damage on monsters, you can't prevent that just because of how high your stats are. If you really wanna "prevent" it, you need to change the stats of your mobs. Also, are you using Renewal or Pre-Renewal?
To remove the Ygg Berry delay, go to your db/item_delay
// Item Delay Database
// There is a max concurrent number of entries modifiable in src/map/itemdb.h as MAX_ITEMDELAYS
//
// Structure:
// Item ID,Delay in Milliseconds
//12202,60000 //Str_Dish10_
//12203,60000 //Agi_Dish10_
//12204,60000 //Int_Dish10_
//12205,60000 //Dex_Dish10_
//12206,60000 //Luk_Dish10_
//12207,60000 //Vit_Dish10_
12208,60000 //Battle_Manual
12210,60000 //Bubble_Gum
14538,300000 //Glass_Of_Illusion
14586,180000 //Spark_Candy
607,5000 // Yggdrasil_Berry
608,3000 // Yggdrasil_Seed
// Bifrost Items
11522,1000 // Red_Raffle_Sap
11523,2000 // Yellow_Raffle_Sap
11524,3000 // White_Raffle_Sap
11525,5000 // Mora_Hip_Tea