It, and Unity are basically mandatory. I don't think that having an Oculus on both yourself and follower will stack though, not sure. Either way, its basically 80% more damage for solo players. Solo and MP will probably be with 3-4 GRs from each other now, combined with the mob damage nerf.
...problem with Oculus Ring before 2.4.1 wasn't that it doesn't work when equipped on follower. The problem was it proced only when follower done the killing blow, so it was really rare. Change in 2.4.1 allowed to Oculus to proc regardless if you or your follower stroke the killing blow.
From my research and observation it is enough to stay in the circle to got boosted People worries to much looking at the sheets when playing. Stay in the circle and think about the destruction you are about to bring!:D
PS: to be honest, I understand why you check everything twice or even more so. That's Blizzard game and they are poor at math
Wrong. It just needs to proc , that's all. You don't have to stay in the circle. If you see the circle anywhere in your screen, then you have the dmg increase, no matter where you stay.
If it is true there is no need for "circle on the ground" indication. If you equip Oculus ring on follower you got circle somewhere almost all the time. As far as I know you must stay in the circle to keep the buff up. Of course there is slight latency after going in and out the circle.
Chance to create an area of focused power on killing a monster. Damage is increased by 70–85% while standing in the area.