Hello there! I'm the same person that did the Rengar guide mythic dance! I'm also a jinx one trick and I've been excited to share my experiences with you!

[A quick tip]: For those who knows jinx potential to steal objectives, with this build it's stronger than usual.
Every time i play jinx my steal count of baron or dragon steal is high, I'm really confident in this domain and would surprise more than one! Of course i still fail sometimes or when the opponent knows how to place vs me!

Try every game to buy Blue trinket at lvl 9 and when they're doing objective wait a really bit, place your trinket there and ult when the monster is around 4K or 3K HP. This tip is really unstable because it will depends about many things like if the enemy got a fast burst etc so please, use R every games to try and steal objectives and NOTICE the dmg it's dealing! By the time you've repeated it you'll get the feels and it will become a part of your skill.