For the most part, Grasp of the Undying isn't a bad pick. I prefer it over Fervor (The usually recommended mastery) because of the sustain. Considering Kled has to land four Basic Attacks to proc his W and usually initiates with a Q->E combo, Undying will proc and the health gained can help a lot when dueling. It also allows for some lifesaving moments right before you get Skaarl back.

It seems none of the "popular" guides recommend it. I bought Kled as soon as he came out and there were no legit build for him yet, so it might be an "outdated" build. I just decided it'd be better for Kled, considering he's an AD Bruiser, and he's not very reliant on attack speed.

As I said, my build isn't finished, second, screw off, you're probably Bronze 5.

It's a great tool for finishing, and with all of the AD you're building, you'll get a great amount of Magic Damage, which is always good to have. But be my guest, you can take a different Keystone, and if you have any recommendations, please tell me!

If I'm gonna be honest, I haven't played Kled jungle that much, so I can't recommend much more than what the shop says. I would follow that, and once you've built the basics that it recommends, build what I have, make sure you always have some kind of Sabre. The runes and masteries should be able to stay the same, but you should consider getting explorer for that bonus jungle movement speed.

This is completely up to you, but I'd get Ravenous for the bonus lifesteal. If you're having trouble, by all means get Titanic for that extra health. That's actually a great suggestion though!

Idk, probably almost everyday for the next week, and then from there I will update it every meta change.