And you know what? It was fun!
Apparently, you can choose "easy" or "hard", so we picked "hard" as, Living Forgotten Realms tends to be (supposedly) a bit easy. Three encounters, two fights.
The first one was a big mess against a large, well-balanced enemy party, where the party's two clerics and the swordmage took the brunt of the damage and someone made two death checks before I took a break from knocking enemy rogues and made a heal check.
The second was glorious. A boss (elite, probably) that felt like 9th level or so and a giant pile of minions. I got targetted early (and before I got a chance to "oath" the boss so I could get a benefit from all the attacks--avengers do extra damage if they're attacked by other than their target), going from a really hefty 34 hp to low teens, and was the bunny throughout the fight, once only avoiding unconciousness because of 3 temporary hp I'd been granted. The minions were nicely handled by various bursts, blasts, etc from the multi-attacking ranger, the swordmage, and the wizard, the clerics mostly kept me upright and hit the boss with a few attacks (I used a reroll to let one hit the boss with an encounter power), and I? In three attacks, I managed to crit with my daily and my encounter for a total of 50 and 42 damage, respectively (avengers, if properly positioned, get to roll twice on every melee attack, so this is only slightly less likely than 1/100), then, with me back in "one hit from unconciousness" territory, I managed to hit once more (a 25 didn't do it, so I used the Deva encounter ability to add a d6 to the roll and hit with a 31) and finish the bastard off.