My personal breakdown:

Well, nothing is going to compare to the ease and convenience of preping with a Rager. IMO, that is the main draw to playing a Rager, as well as the game-mechanics source of most of the fun to playing a Rager. Basically, you get to roam around as prepped as you'll ever be, ready for action, almost 24/7. Pure awesomeness. (Of course, there are substantial game mechanics costs to Ragers to make up for that convenience. )

That said, getting "minimal dam redux" for warriors for every fight is pretty easy if minimal DR means "protection." I've played a bunch of warriors, and "protection" was always a given. Stoneskin + protection brings you to about the effectiveness of Rager resist, and you can buy stoneskin (i.e., it's not time consuming to get) but that comes at the cost of convenience. Now, you don't need SS + protection for EVERY fight, but you do need them for particularly tough enemies that you can't kill in a few rounds. There are always a small handful of these types of enemies.

Then there are the enemies who are deadly and highly conservative (i.e., they won't come to fight you unless they have every DR available, and will flee immediately if a DR falls). These guys you need to bump up the DR to include shield, which IS time consuming to get and inconvenient to use. Fortunately, there are only a couple of these deadly+ultra-conservative types playing at any given time. Also, one way to avoid them is to just avoid raid situations because given the amount of DR they expend, they are going to want to increase their chances of actually being able to PK while the DR's active - so raiding situations where their enemies are forced by RP to respond. Anyway, the shield situation does suck for a hero level warrior, but like I said, it doesn't come up the majority of the time.

As for aura, I've never used it on a warrior. Too time consuming.