In the meantime, a guild mate was good enough to meet me in Dalaran and whomp up some nice shiny new epics for Aeven. So she's now sporting a Tempered Titansteel Helm, Tempered Titansteel Treads, and a Titansteel Shield Wall. She rounded out the ensemble with the classic (yet fashionable) Daunting Legplates and Daunting Handguards. She wanted a Titansteel Bonecrusher too, but it was apparently not meant to be.
So her gearscore is now a whopping 2600 even. Health is 19k, mana is 5.5k, armor is 20K, defense is 492. Probably overpowered for tanking regular dungeons, which is just fine by me! She's going to complete her questing in Northrend to hustle up the cash to train epic flight, and then burn some more leveling engineering before drifting into heroics.