I am doing this in the same thread because of how I have enjoyed them the most.
Both of these items either require a lot of effort to be good or just are not that great at all.
However, I decided to try using them on a new character. The results were both amusing and very good.
Lets start with LoD. It is essentially a free set piece. The more it is leveled, the better it gets. When I did my test with a new character, it was relatively low level, only 17. My curiosity was if it would help level an alt.
It does, quite a bit depending on how many legendaries you can put on. While low level, the sheer number of legendaries you can get on the PTR let me level incredibly fast because I never had to drop from T1. If the delay for logging on was not so long, I would have tried increasing the difficulty.
I also wanted to see what Echoing Fury would do. The answer was a surprisingly large amount. It has no good use at max level. But when leveling, it allowed even a necromancer using Grin Scythe to move extremely fast and kill things with no real issue.
Combining the two, I got an alt to 70 in less than 2 hours solo. I am going to work a bit more and see if I can level even quicker.