To give you a bit of insight on the AoE ring in the screenshot; the red ring surrounding the peiste indicates that the monster's AoE attack is coming and where it will hit. (So you better move!)

All players will be able to see these AoE rings, but please note that these rings aren't displayed for every single AoE attack, only for special actions. Lastly, these rings will not be displayed for player enhancements such as protect and there are currently no plans to be able to toggle these on/off.