I don't realy think, that Atma's Impales is very good item for Jarvan IV, because he doesn't have alot of HP, I would better buy a Randuin's Omen or Warmogs's Armor.

I think you don't play Jarvan 4 to his fullest potential if you don't take flash. If you use your ultimate and then directly flash out of it you can escape certain death very easily in some situations. Or if you are against Karthus and you just killed him but he kills you afterwards because of no flash ? It certainly got a lot of uses especially in teamfights like at baron you can seal a team in your ultimate and flash out of it and focus on the other guys.

Flash + Jarvan 4 ultimate got so much use and makes your ultimate much stronger, ghost is useless imo because with trinity / randuins / phage / your W you shouldn't have much problems chasing and getting kited also because you have a knock up gap closer and an ultimate which is also a gap closer.

The items are a bit weird to because you build a HoG after boots but then decide to go phage --> trinity force which is perfectly fine but then afterwards you get atma's and I find it weird. What use is it that you have a bit extra armor, a bit more crit and about 50 extra damage while you already do enough damage with trinity? An AD carry will still beat you easily with 1 CC and you don't have anything to lower her amount of damage and then the AD carry wins because you lack CC and escaping ability. Sure Atma's Impaler is a 5 star item on Jarvan 4 but I think randuins should be a 5.5 star item on Jarvan 4 at higher ELO levels.

I also think that leveling up your Q when vs AP carry champions and then your E ( and possibly your W ) can help a lot. It also helps vs Irelia because you can't beat Irelia in an auto attack duel anyways.

The rest is pretty okay but I would replace flat armor quints with armor pen for Jarvan 4.

Btw I can help you with a jungling section for Jarvan 4 because I played him 90+ ranked games as jungle and main Jarvan 4.

Man what a great build. I've seen all of your videos and especially that one with brand. Thanks for this build. +1

+1
Good offtank build, personally i play him tanky dps

Thanks :)
Yeah I'm still expanding and making it better :)

man I know your good so I upvoted, but you should expand it more and make it really complete :O