Best hybrid build? Orb lighting or Orb Fire?

My go to set up. ABSOLUTELY decimates most monsters

Except you can’t. Cold mastery is passive resist reduction, and it does not work towards cold immune.

For a secondary spell FO technically only need -100% but to each of their own

Orb Fireball is the best hand down. Orb Light is ok damage-wise but that 117% FCR breakpoint of CL/L really messes everything up. Don’t do it.
Best setup is one CD (FO) + 1 active skill (FB). FW doesn’t work well since you have to stand around waiting for FO to be off CD before casting FW.

People also forget or maybe plain just don’t know another advantage about Blizzard.

With Blizzard you can do offscreen casting. Essentially killing mobs without them being on screen. The AI in the game doesn’t track back to casting origin for off screen casting of BLizzard either so you can take a few “wiggle” shots at it even if some shard misses.

Can’t do that with the half screen FO.

You can’t cast FO and FW at the same time?

That conversation was, I believe, pre 2.4 when FO shared cooldowns with skills like FW and Blizzard.

Now it’s different.