So, uh...Tahm Kench

I recently picked up this champion, and started playing him. I literally have not lost a game playing him, feel free to check. While I consider myself pretty good at support, I was wondering why he's so good Looking at his stats, his mana costs are low for the utility/damage his abilities do, he has a .7 scaling on his Q, on a 6 second cd(not taking into account any CDR you build)

I am not claiming to be amazing at this champion, nor am I saying his stats are OP enough to make bad people do well on him. But his Q, which is a slow(or stun with 3 stacks) costs 50 mana, and is every 6 seconds. His E is also 50 mana, and while it has a fair cooldown of around 16-12 seconds, it's pretty handy. One tanky mana item(Righteous Glory comes to mind) and he has no problem putting out constant CC/damage with no real risk, considering you don't need to build him AP to do damage, thanks to the bonus damage his ult passive gives.

This isn't supposed to be a rant(considering I win a lot with him), just trying to let people know...This guy is really strong on paper, and in game if played the right way.

tl;dr: Tahm Kench does a bunch of damage without building it, and has a ton of utility with little drawback aside from occasionally moving slower when eating an enemy.