Shouts + Powerful Aura = fixed?
Well you do get other boosts from it, like 2x healing and protection. But i actually agree with your points. At least flame aura and maybe chaotic aura deserve to stack as well. Also no as of right now its stil the same.
fire aura stacking would be important. Also rune of radiance fully working and also taking into account the fire trait one with fire. This might be a base for some aura builds. There are manny fire aura applikations and i am tempted to use one with fire + rune of radiance, focus and feel the burn for keeping fire aura on the team.
Fire aura on: swap, focus 5, feel the burn and optional conjurer trait + maybe reworked rebound. This is a lot of fire auras with +66% duration. Theoretically …
There is no risk in testing it in final BWE. Make Auras able to stack in Duration and see how it goes. If it is way over the top, cap it at 2 Stacks so at least PA and the Shouts work together. This would prevent all the nasty 20+ seconds Magnetic Auras Karl might be afraid of:
Earth Overload + new Rebound + Magnetic Aura (Staff) + Shock and Aftershock + Powerful Aura
I still think there is no need to do much effort for rebound. They have a mechanic implemented. Just add shared light aura and make rebound instant cast on kitten CD and woot you have a useful tool.
Of course sharing an aura dependend on the current element feels better fiting ele.
Aura stacking could be interesting thing to play for sure if other auras, not only frost, would work this way.
The thing is that permanent or pseudo permanent magnetic aura and shocking aura would be totally OP applied to a group via boon-share. Both auras are heavy counters to ranged & melee attacks respectively that only have really limited counterplay. (unblockable attacks – waiting) They will need heavy limitations to allow stacking.
Only fire shield seems to be potentially capable of being stacked without breaking the game as the burning duration can be adjusted/balanced and its only an increase in dmg. (you get hit all the same)