Glad to hear that ^_^

Awesome guide made me main Jarv and also made me better in jungle.

Okay, so I went and tested it, because it might be better than my current setup. Maxing Dragon Strike does seem to make you and your team do more damage overall, as well as you being able to land multiple knockups withing the duration of one Demacian Standard. However you burn through mana like a Heimerdinger. Also as a side note, I will always get all 3 of my abilities by level 3 as a jungler, no matter who I'm playing as having all 3 can sometimes mean a kill or save your life (eg. Jarvan IV's Golden Aegis or Skarner's Ixtal's Impact)

If you know how to manage your mana properly, this is a pretty great way to level your abilities. However if you're new to Jarvan IV, you might want consider the skill progression I have on the main build.

TL;DR: If you're new to Jarvan IV I would suggest maxing out your Demacian Standard for more general tankiness and possible mana problems. If you are more experienced as Jarvan IV I would now recommend maxing Dragon Strike for the increased ganking and (possibly) increased mobility.

Item's truly can come down to preference, your selection isn't bad - it could just be better. I'm just curious you say you have a lot of success. What level of play does your experience/success come from?
It's not my idea to build these items, or choose the ability selection I have explained. I didn't pioneer it. I've studied numerous guides, been playing ranked with him for around two years, and studied the pro's methods who have excellent success. You're gimping J4 and not maximizing his potential or your teams damage all for an extra 10% attack speed and 10 armor I guarantee you thats hardly noticeable compared to the % Armor Penetration, Damage, Cooldown reduction on your Q it's just a no brainer. But i'm just trying to help you out and others out who may read your guide, that's a huge mistake. If you don't want to take it from me, take it from saintvicious one of the best NA, or even one of the best junglers in the world, but what does he know. I've tried both to be honest, E is definitely safer if you miss your combos and want to rely on the buff it provides, however the burst+damage buff maxing Q first provides if you rarely miss a combo on someone land slides maxing E. Anyway, best of luck to you.
http://www.lolpro.com/guides/jarvan-iv/237-jarvan-build-guide-jungle-by-saintvicious

This is the way I play Jarvan IV pretty much every game, and it has a high success rate for me, as well as some other people who have read this guide. Yes, maximizing Dragon Strike does have some advantages over maximizing Demacian Standard, but I find the aura attack speed to be more useful during the smaller skirmishes that you tend to get into earlier on in the game.

Also, getting Golden Aegis at level 3 does two things, one is the obvious shield it gives you to soak up some of the damage that will be dealt to you. The more important one however, is the slow that it applies. Although minor, it does help greatly, and getting it at level 8 will leave you without some damage soak, and some minor cc.

Having the 40% cooldown reduction is really just a preference, it helps making sure you have your Cataclysm up as often as possible as well as your E/Q combo.

I've stated in the items section of the guide that I choose certain items mainly because I have a tendency to forget activating certain items. If you noticed, none of my items have an active ability, and instead I chose the lesser version of that particular item to help me have the same effect for my team.

As far as Trinity Force is concerned, I know it is a great item on Jarvan IV especially with the new changes that they have made to it. However It is the 3rd most expensive item in the entire game and you won't be able to build up that much gold and still be a practical tank at the same time unless you are ridiculously fed. If you were playing top lane that would be a splendid choice. I will add it to the recommended item set, along with Maw of Malmortius, but I will not put them in the main build.

J4 is by far one of my most played in ranked matches.
The fact that you're telling players to Max E first makes me cringe. Your missing out on his bread and butter. Heres my recommendation:
MAX Q FIRST.
MAX Q FIRST.
MAX Q FIRST.
MAX Q FIRST.
and lastly: MAX Q FIRST.

Also a note, with each level of Q its cool down is reduced. E's cooldown is 13 seconds.

Never, ever ever in any situation/circumstance Max E First. Your missing out on a TOOOON of damage for yourself on the team - Q Shreds their armor and just does a lot of frontal burst. And I would almost never build W before level 8. Your ability build should be as Follows: E-Q-Q-E-Q-R-Q-W-Q-E-R-E-E every game. You do not have the early game mana to pull off using W.
Items: I would not recommend Frozen Heart. You don't need 40% CDR thats just silly and over kill. You'll have 30% with Spirit of the Ancient Golem, and Locket+BC. You almost always want to insist on building locket, ask the support to build a frozen heart or something else. Randuins should replace FH for the slow and 500 health. Your build looks like it just needs HP.
In short:
MAX Q first, then E. Get W at earliest level 8. Randuins, not Frozen Heart. Locket of the Iron Solari, almost every game. As a 6th damage item options: Maw of Malmortius/BotRK/Tri-Force.
BotRK/Tri-Force combo'd with his burst kit is insane, Maw of Mal. if theyre AP Heavy.

Ideally:
Golem/Ninja Tabi/Locket or Visage/Randuins/Black Cleaver/Maw of Malmortius

I find that Jarvan IV doesn't really have a level of play where he particularly stands out. In low levels, he is good for catching people out, and making people pay harshly for making mistakes. On the same note, he is also a very solid initiation at higher levels of play.

If you play Jax a lot in ranked (I assume jungle), I would suggest playing people that are like Jax in that they get a lot of their damage from auto attacks, if thats what makes you comfortable. Some obvious choices are Xin Zhao, Tryndamere, and Aatrox as they all have a gap closer, and have some sort of cc to keep them on their target.

If you go into solo queue a lot, then I say that you are in the right area for jungling. Although the hard tank/initiation champions are pretty great, you also have to make sure your team is going to follow through on it, because nothing is worse then getting a perfect Unstoppable Force from Malphite just to see your teammates aren't reacting to it.

If you do feel the need that you want to have a harder initiate, I would recommend Hecarim or Zac, as their long range initiates are perfect for getting in, and you can usually last long enough for your team to show up behind you.

If you have any other questions, please say so. I am far from the best league player in the world, but I try to help when I can :)

Great guide annunziato, great explanation and awesome in generally...my question is: in your opinion is jarvan good in low-elo solo ranked or he's more useful at high level? (obviously in the role of tank/offtank jungler, I'm looking for another champion, because I've used only jax in ranked) or there are champ more comfortable? (like Zac, volibear, nautilus, champion that i see a lot in this current meta)...

If anybody is able to 1v1 a late game ad carry then I applaud them. Jarvan IV is supposed to make it easy for the rest of the team to deal lots of damage, while you absorb a lot of it, plus any damage the enemy ad carry does to you is that much more damage they aren't doing to the rest of your team.

This is a generally good guide, really tanky, but you really alck damage, you can't even 1v1 an adc lategame. He just lifesteals ur tiny damage.

Yeah, you usually will never hear the end of it if you ever accidentally trap a teammate with you in Cataclysm. If you got anymore questions just let me know :) I might be far from the best of Jarvan IV players but I do my best.