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As the Tittle suggests, if a Bloodrager/Oracle qualified for Rage Prophet, would Bloodrage be considered "raging" for the purposes of this class feature.

I understand that Bloodrage /= Rage except for some specific instances, and for a good chunk of the Rage Prophet class features Bloodrage/r wouldnt be applicable regardless, but in this case is being in a Bloodrage considered "raging", or is "raging" just synonymous with having the Barbarian rage class feature active?

I ask because I noticed some mention around the net of using Bloodrager as an option to enter into Rage Prophet via Primalist Archetype, but if you are not considered "raging" while in a Bloodrage then there would be no benefit really right?

Are there any classes that buff allied Spellcasters? Specifically, affecting their spells (be it increasing caster level, adding metamagic, etc).

From my cursory check, all I spotted was Magician Bard, but I doubt that is all there is.

Feats (or anything else really) are fine as well, presuming that they do not require the buffed spellcaster to take them (or the character has a way to provide the feat to the ally)

3rd Party Material is fine, though 1st Party is always preferred.

As the title.

The Geminate Invoker Barbarian has the Trance class feature which modifies Rage.
The ability states at the beginning of its 2nd paragraph: "Instead of the normal rage bonuses and penalties," and goes on to lists its bonuses, but does not list any penalties.
It notably states you can use skills normally restricted while raging, but doesn't say anything about concentration. It was a little fuzzy if this means they still can't cast spells while in a trance or not, but I decided to compare it to the Moment of Clarity Rage Power, which states "The barbarian does not gain any benefits or take any of the penalties from rage for 1 round." It goes on to clarify that these bonuses/penalties include the restrictions to actions. This seems to indicate the action restrictions are a penalty.

With that in mind, would Trance allow a Barbarian to cast spells while it is active, given it doesn't have the normal penalties of rage?