So I’ll agree with VanGo on the first parts here for sure.
This just isn’t true. I’ve had several instances where I used Aura as a player, and where some of my players have used Aura, and far far far more effective than Barrier, especially for boons. Ways to give water breathing to everyone, survive a harsh environment better, some interesting heals in some clutch situations, etc.
Like many things in OL, a boon, bane, feat, etc can be more effective due to the situation you find yourself in. The fact that Aura travels with you, and gives you free area multi-targetting is pretty big. Not to mention having boon focus gives you auto success on any boon you can do with Aura.
I don’t see the point of the Silent Aura, as this could already be something flavored into your Aura to begin with. Depending on the flavor/fluff/nature of how the aura is, it might already be not noticeable without an attempt to see it via action roll from an NPC.
I’m not sure if I like this one honestly. Aura was very purposefully limited to a PL 4 max so it wouldn’t start hitting into PL 5 boons or banes.
The fact it has tiers is a huge no, just 1 single tier, I could see, but having 3 tiers means you could have PL 7, which are when some really big hitters come out.
Some playtesting maybe, but I could potentially see this as being a bit too strong, not horrible if only 1 tier.
Like VanGo, I think this is too huge of distances to begin with. I’d do it a little differently than VanGo suggested, but only a little, in not doing a Tier 3, and just 1 and 2 like he suggested.
I also feel that even that might be too powerful.