Im mastery 7 Kass
So is tinhead Timmy who is hard stuck bronze 5.
As for the rest of your post let me give you a scenario. Kass takes tp in this match up or insta loses, azir takes barrier.
Post 6 azir places a solder to hit the ranged minions and you if you try to farm. You walk forward and he auto q's you, you r e q and try to walk forward to proc w. He summons a second solder and starts autoing you while kiting.
From this point if you walk away he get ~3 solder autos and another q off causing you to lose the trade significantly. If you try to all in he has a combat summoner, a likely hp advantage, and an escape if he somehow manages to fuck up.