More than 32 players supported in UE4? Max AI supported?

But what about NPCs? how much NPCs mixxed in with players could Unreal handle?

here are some examples I found but I have an strong urge still trying to discover the limitations of this engine… so that I can create a large massive NPC battle also with players amongst the battle something like lord of the rings but actually getting involved with the whole battle.

Whats the best amount you recomend?