The designs you did are ok but from a graphic design stand point not so good. The main issues that I can see are that they are all way to busy and detailed for a good logo. A good logo or more professionally referred to as a combination mark should be very simple and clean; remember a CM is something that needs to be readable very small to very large. Also your typographic choices are very hard to read quickly. Blocky letters tend to close in on themselves visually and are hard to read, and novelty fonts are another thing to stay clear from when the "western" styled font and the blood dripping one. Another thing you never want to do is to warp or distort a font, having them follow along a curved path is fine but do not keystone them so that they narrow at the base. Also your kerning (the spaced between the letters) is too tight, meaning they are all too close together this also make readability an issue.
Good job on the concept part though. Often the hardest part of design is coming up with ideas, and good job on working with variants as this is a great way to start to hone an idea and make it into a solid piece.