Try keeping your entire army in reserve to start the game. When your units come on the table you can place them where you need them.
 
 I find this is a good option 50% of the time.  It's really a choice you make after you see what the mission/deployment/terrain looks like.
 And if you are in an open list environment, what's in the enemy list.
 
 Certainly it's nice to place stuff where you need it (in addition to limiting 
LoS to returning fire), but you are still coming in piece by piece, and that can be a very bad thing.
 
 In addition, there is no guarentee that they stay in reserve until the variable end to contest/claim stuff.
 
 So... with so many deployment options, i would suggest much caution on top of all of it.  Bikers are not forgiving and deployment is huge for them.
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 As to Ravenwing: it depends on the list, if you are going doublewing, then he'll most likely want the bikers starting on the board if he goes with Deathwing Assaulting.
 
 Otherwise, Ravenwing much more like the defensive qualities of Reserves/Outflank, but suffer more in that their model count per squad is lower and more things are randomly coming in piecemeal.
 
 Soo... I think the rewards for playing Ravenwing are much higher as it's a scalpel, but the falls hurt real bad.