Well, you asked for comments, so I'll give them!
The Fire Dragons seem to be riding along in the falcon, so I'll say this now- this is a bad idea. They really do need their very own Wave Serpent, as falcons are best used for long ranged AT, and last minute objective contesting/nabbing set up as DAVU. Serpents aren't as vulnerable to Melta-fire, being the most primary reason, plus also if you field a Falcon, you really want it to be firing that Pulse Laser, not transporting troops most of the game. (DAVU being an exception).
If the Scorpions are footslogging, as it looks like, with this list, then bring the Dire Avengers out on foot- use their abilities to act as a pinning unit- and then have the scorps as a counter-charge supporting unit for them. Then you can place the Dragons into the Wave serpent. It's your call with the weapons on the Serpent, but for moving Dragons about, then you don't really need the EML's. having said that, if this is a "throw away" kamikaze squad, then it's not too bad an option, as likely you'll have no dragons left to stop the Tank using it's weaponry fully.
Now Shining Spears are jetbikes on steroids, basically, and geared more for CC. Now the Spears seem to have the Autarch accompanying them. This is fine of itself, don't be suprised if that Fusion gun pops any tanks you where planning to charge before you get into CC. On the whole though, this unit looks rather isolated, unless of course, you have a plan to support them. I still worry for them though, as they're clear "stand out" targets. Reserving them sounds like an option, with the Autarch, but they'll still leave a large footprint.