Open World Survival Game Tips & Tricks!

Hi Guys!
Im making open world survival game, and is there any tips you can give to me??
(about performance, quality, networking and multiplayer etc…)
Im using Grass Tool!(Grass Quick Start | Unreal Engine Documentation)
Should i use Procedural Foliage Tool??(Procedural Foliage Tool Quick Start | Unreal Engine Documentation)
Im using Unreal Engine 4.16!

This…nough said.