Understood, and with that in mind here is what I see...and this is solely from a competitive approach (if you're really into Raptors and the visual/narrative of them crashing/dashing forward, then go with them). Issue number one is the foot slogging MSU cultist units x3. I'm sure you put them in here for their points efficiency, as well as their ability to hold backfield objectives, but here's the problem: they are just too slow compared to the rest of your army, and you really shouldn't place any objectives in a deployment zone playing this army to begin with. Place your objectives in the center of the board (left and right center-line after that), and plan on holding those turn 5. Tournaments are not going to use TAC cards, so you need to focus on holding objectives at the end...every other turn you are racing forward and grabbing victims for your melee. If you find you have one in your deployment zone...ignore it and move forward...you won't get it, but neither will your opponent, lest he divide his forces and deep strikes on it, in which case you're going to hold all the mid-field and enemy deployment zone objectives because he split up. If things go well, you'll hold three at least, and he'll hold two (the one's in his DZ). That means you've got LB, STW...and he'll have FB (probably) and hopefully that's it. This is presumptuous, but achievable.
The second issue (and again this is really only from a competitive approach) is the durability of Raptors. Any sound player will focus on shooting what they can kill entirely, or at least effectively neutralize (which will mean killing your 5 Raptors to a man if you place the MG in the rear as you move up...which you will), and in this meta that means 5 marines are really not hard to take down. That's a lot of points wrapped up in two units that will be targeted/killed turn one. That drops two valuable AV options, given your Bike units only have one AV shot each...so some will miss, thus wasting their firing potential for a full turn...with turn one rendering them largely ineffective. Consider giving your bikes an extra MG...and maybe the SGT a combi-MG. Their T5 will bode well against most shooting, thus making them a better fit for AV/close quarters fighting. If you really like Raptors, then I'd most certainly deep strike them behind the enemy, but that means you've done your opponent a favor in turn one by refining their shooting priority.
I know this is worded a little blunt, I just hope its received as intended. You gave me some solid feedback, and I'm just trying to return the favor. Hopefully if nothing else this gives you something to weigh on when building/designing your next army list. Best of luck, and Slay the Warlord! Cheers!