Lasher Dragon
First Post
As said above I would definitely keep in mind the distance they are tumbling - not so much for the monk maybe, with their crazy movement, but the rogues especially. Get some monster with an unbelievable reach, such as the boneclaw (20 ft reach IIRC, even though IIRC again they are only large size) from MM3. Chances are the rogues would have to use an entire round to tumble into flank, waiting until next turn to attack. Not that that would matter much anyway, since it is immune to crits, being undead and all 
