The wraithguard are 210 with d-scythes. You might be using an old book or something..
Yes, the caltrops are good, but you wouldn't want to use reavers as late-turn objective grabbers. They're too expensive for that, and they don't have obsec, so they're not great at it anyhow. And reserving them is just 1 additional turn where they can't assault, which is what they DO do well.
After recently running the numbers on the differences between 10 warriors in a raider and 5 warriors in a venom, I don't think I can ever recommend 10 in a raider ever again. They only average 3 extra splinter hits per turn when in rapid fire range with their rerolls, and outside that range, they're completely outclassed, while paying 60 extra points for the unit with racks and night shields.
If you swap all those warriors in raiders out for warriors in dual cannons venoms, you save 180 points. Your points are off by 10 on the reavers too. I haven't checked points on everything. Just pointed out what I noticed by memory.
If you're allowed to run 3 detachments in your local meta, I'd make 2 CADs and an Allied detachment instead of using the realspace raiders detachment. Objective secured is too important to lose if you don't have to.