And I am gonna call BS here. If all players have the same paragon, and 1 has correctly rolled Primals, and the other has incorrectly rolled non-ancients, the one with Primals (if competent) is nearly always going to win against the one with incorrectly rolled non-ancients.
It is the same for both. If there is a huge disparity in gear or paragon, the one on the upside is going to have a huge advantage. Now as far as paragon goes, you have diminishing returns the higher you get. Look at the LBs. There are players with 6000 paragon above players with 10,000 paragon. The one thing that all the top players have in common is generally their gear is incredibly close.
Surely, you guys are jesting. If you went back to S1 with the gear that was available then and gave everyone 10,000 paragon, I would seriously doubt anyone is clearing GR100, much less GR150. With the insane power creep in the game now, players can easily clear GR100 with simply the base P800 (not the tweaked S29 version). The gear in this game adds way more power than a ton of main stat from paragon does.
As stated above, I easily crushed a GR110 with P554 on UE which is far from meta for a DH and far from the best build (Tal Wiz). Pick any build from S1 from any LB S1 and take 10,000 paragon. You won’t be doing GR100.
I am not saying paragon has little or no effect, I am saying far more power comes from the gear we have with massive multipliers all over the place than it does from even 50,000 main stat.