I recently had the pleasure of getting dismembered by a Dark Eldar, highly mobile Red Grief/Flayed Skull army.  My opponent used a Void Raven Bomber and a large unit of Reavers (via Strategem) to deal 
MW and get a T1 charge with the bikes.  He killed half my marines on T1, denied me deep striking (in my own zone) because half his army was already across the board (thanks, Beta Rules 

 ).  My initial strategy was to deploy in transports (to try and get T1) and shoot his few visible threats-- this was a mistake. I had deployed aggressively thinking I wanted to be in a position T1 to charge/counter charge myself knowing his army was mobile and going to be in my face quickly-- this was a mistake.  Question is-- knowing that vs this type of list, which I'm afraid I'll see a lot, is mobile, but also an initial low model count army that might go first (but is mostly out of 
LOS on T1 anyway), would a "denied flank"-- putting my army in a corner, and placing infantry about 3" in front of my main force to deny him the opportunity to move over units and get his initial 
MW off-- be better?    
 
 Pros: Generally, I know putting "bubble wrap" far enough in front of the force to deny deep strikes, but also deny consolidation is the tried and true strategy, but otherwise I think having a smaller "elite army" and the two units dealing the 
MW before I can even move is too much of a threat and this would prevent that.
 
 Cons: He could still probably T1 charge my bubble wrap and consolidate into the bodies behind (but I can also fall back and shoot).  It would also pin me in a corner-- and while I have reserves and transports-- depending on the mission that might not work in my favor.
 
 Or what strategy would you use to fight a list like this?