I always hear about insane nova builds that can drop Orcus in a round (at least before errata), but it seems these builds rely on encounter and daily powers. How could you get stupid damage from At-Wills?
I've seen a level 30 ranger build to do up to 200 dpr at will, but what about heroic tier? The closest thing I know of is the essentials rogue spamming tactical trick and sneak attack, but that relies on mobility and positioning: lose one or the other, and he's completely sunk. At first level, he could do max dpr of around 25-30 damage. That's pretty good, from experience playing it.
So any others in heroic tier?