I doubt there's such a thing as an invisible leader. I use short, inexpensive leaders in pike and pickerel waters, but they wouldn't do for large muskies. Here's an excerpt from an article. You can try a search for musky leaders.
"Leaders - There are numerous manufacturers of musky leaders on the market. Many produce top notch products, and yet others produce a liability. I am a borderline fanatic on my leader selection. I never purchase leaders with crimps on them, since crimps can and will fail. As pointed out in the beginning of this article, a hard battle by a musky is often all it takes to expose a poorly crimped leader. I personally buy leaders made by Bucher Tackle, since these hand tied leaders are proven not to fail at the moment of truth. I am somewhat biased since I worked for that company for six and one half years. However, I can honestly say the neither myself, or anyone else I know, has ever had one of Joe's leaders fail them! I have seen and heard of horror stories about crimped leaders coming apart.
Unfortunately, all of the titanium leaders I am aware of are crimped, so I will never try them. This doesn't mean that they are all bad of course, but one runs the risk of having one with a poor crimp on it. I know that it would be my luck to have a defective crimp on my leader when the biggest fish of my life strikes, so I simply avoid that possibility all together! Another product I personally won't use is Fluorocarbon leaders. Many of you will argue that these are the best things since sliced bread, but I know a prominent guide friend of mine who had a huge fish inhale his crankbait at boatside and bit through his 100 lb. test like a warm knife through butter. They won't do that with steel. Leaders are an important cog in your arsenal. Make a wise choice when purchasing them, and don't skimp when it comes to quality! After all, you are investing literally hundreds of dollars in your rod and reel and lure purchases."