Not really... the Dracon will rip everything apart.
As for your Scourges w/DLs...
In normal 40K, they are pretty much pointless.
In cityfight, though, they really shine, because they are so mobile. In cityfight I'd also recommend that you take 7 Scourges (no sybarite) in the squad to cover DT losses. After all, if they're sitting on top of a building taking pot-shots at enemy tanks all game, then they've done their job. It's possible to get them into position in about 2 turns (usually) or sometimes 3. Either way, you'll probably have the fear factor going for you the entire time. He might commit a squad he would otherwise assign for something else (ie Assault Marines) to chase down the Scourges. If he does this, he's taken out a significant part of his force's attack strength. You'll probably not need a sybarite in this case because
A: If the scourges are in assault, they're screwed
B: The bulk of the opponent's army won't be able to reach them at all, so they won't be in range.
-BA