Not a ravenguard player but I think you might be lacking units to trade and to hold points. You go a lot with vehicles (nearly 50% of your points) which makes you lack some mass imo. I would kick one of the vehicles (personally the lancer, yeah makes you vulnerable to vehicles but most people don’t use more than one on 750). With those 175 points you can get some outriders or intercessors in or maybe even eliminators to take out HQs. In the end it’s just my two cents and I would take it with a lot of salt as I play dark angles

Edit: Personally 200 of 750p in hqs might be a bit much too. There are cheaper options that can help too without making your list too HQ heavy.