It really isn't a merge between those 3. Trust me. If you can show me what part of any of those three has a turnaround like the one at the top of the 3rd screen, or that has anything like what you've done over the water, then I'll agree that it's realistic, but at the moment, those 2 bits of the track look really disjointed and look like you couldn't be bothered putting any effort into it (Which is what I meant by saying a "Last Minute Coaster").
Just because you take a few ideas from different coasters, that doesn't mean it's realistic, or that it's a merge of them. You need to be able to make the coaster flow through all of it, flow through all the different ideas from the different coasters.
As for what do I mean by disjointed, the turnaround after the first Flying Snake Dive I think it's called, where it goes up a hill, then down, then turns around, then down some more. It would look better if you made the corner into one of the corners that goes downhill at the same time, and just have a bit of straight after the downhill, before going into the airtime hill. Then, for the stuff over the water, I'd just scrap that bit altogether. I don't know what it is about that bit, but it just doesn't look right.
The first bit of the coaster is good though. It's just after the flying snake dive where it goes a bit weird. I just hope that you theme it as well as you have done with some of the other bits in this park so far 8)