Which one is harder to master and which one is more broken? I want to find a mid lane assassin and fighter champ that is actually hard to master, and not recommended, because recommended champs are well known and gets banned in ranked a lot. any champion? I want it to be hard to use and master. Someone recommended ekko or zed, which one? if neither can you guys suggest some below?
Im gonna say Zed is harder to master by far but they're both /good/ ;not broken; in their own circumstances. If Ekko is super behind, same with Zed, then they're almost like Rengar. They have the ability to get back in the game but theyre fairly useless if they're way behind. Zed has higher outplay potential I think but Ekko can do a surprising amount of sustain damage and has the option of being pretty decent ap off tank/ like elise.
Orianna 
is by far the hardest mid lane champ to master and she can reap the most rewards and if mastered is severely broken.
Ekko's much harder to master IMO but Zed's probably up there as one of the most broken champs in the game right now.
ekko is definitely harder to master. (imo_)
Zed lane imo is more fun, he has easy as fuck last hitting (literally (almost XD) never been in a game as Zed where I am not the #1 CSer due to the easiness of his last hitting). His combo feels smooth and also he has a great escape in W in you are judicious with its use.
Ekko on the other hand has a less reliable escape, although i believe all 5 of his abilities (including passive) can all act as a semi-escape, leaving Ekko much more slippery than Zed, albeit with a less reliable escape early in the game.
Ekko has potential for more flashy plays imo; His W has huge potential to win fights, but remember this ability is one of the hardest abilities in the game to land. It's like landing a pantheon ult, except that the hitbox is 1/7 the size. The delay is huge so you must realllllly anticipate your opponents movements; but if you land it, it is mad rewarding.
I've played more Zed than Ekko, and both are mighty fun. Still I think ekko has the higher skill floor and the higher skill ceiling (he is harder to learn AND harder to master).
but why not pick up both ? They are somewhat similar as divey slippery melee assassins with a nice escape. Just pick ekko if your team needs an AP mid, and let's say if your top and jungle are AP maybe go Zed to have a balanced team of AD/AP? Keep the damage types diversified. It can work, but it's disheartening when your jungler and top both pick AD champs and then your mid decides to choose zed XD Makes enemy itemization (for armor way too fucking easy).
ekko is nerfed by black cleaver :3
