What auras might be used by trekking team or a team looking for some bosses? MPA for sure. Antimagic or Antiranged? But there are no mobs dealing these kinds of damage, apart from plants - and nobody hit plants on treks or boss hunts, it's only if you are going after some plant boss. War Cry? You need to have no less than three melees in your team to make this effect notable. And all that for what? To kill a pair of aggro a bit faster? Not a big deal, there will be much more on the route. To increase damage output on a boss? But this is ridicilous increase and MPA is way more useful in case things go out of hand and team is about to go down. Regen auras? No point, we have healers. Berserk? Don't make me laugh. As for grinding teams, you need only MPA and only if you got adds on you.
Therefore, the only thing you really need in PvE team is MPA, anything else can be easily neglected with no drawbacks at all. As for PvP teams - that's the only case when chaining protection auras is needed and useful.
Therefore, the only thing you really need in PvE team is MPA, anything else can be easily neglected with no drawbacks at all. As for PvP teams - that's the only case when chaining protection auras is needed and useful.