Nope, the defensive person is you. Are you for T4 to be easy or hard? I like real challenges. You can check babun1024 on helltides website for chain lightning last season. I don’t just do the talk I also do the walk.
I can assure you as well that a lightning spear sorcerer is going to end up as the fastest farmer this season and is going to sh a t on death trap rogue or bone wave necro. It’ll take just a bit longer. So much for balance 
As for copying builds, diablo is no rocket science. You’ll end up the same way if you think logically. The part to think is in early levels where you have to adapt your paragon board or skills for resistance, cooldown, armor etc. I do that myself.