Just a thought:
Sure there are some pretty common and relatively efficient (at some point in development) base designs out there that are commonly known.
Though, just copying a path layout is not enough, as your tower types and levels as well as troop types and levels and of course the wave morale points also have to fit together and complement the path layout.Thus you can’t actually just go ahead and copy MasterE’s deathbox design - most likely, some parts of it will be way different, even if you have the exact same path.
So using a “tried and tested” reference design can and will work out poorly in a lot of cases.
So I personally rather try to use the ideas behind those designs and/or some efficient small-scale (e.g. involving just 1 or 2 towers) tower placement patterns and recombine them to fit my current options regarding troops, waves, towers and available space.
Also, just take the clover design for example: I guess there are dozens if not hundreds of variants of pure and mixed clover designs out there, so even if you use a clover-style design you may still put your personal touches to it.
And don’t forget: Surprise is valuable, hence a clever “custom design” can be much more challenging than a standard design that your attackers have already seen and fought dozens of times before.