talking about
Passives is the 3 most powerful skill after R , Q
When you are in the jungle at first lv the first attack is passive between 260-315 dmg
Passives act with double dmg Infinity Edge , + Trinity Force 200% base atack + lifesteal(wehen y have bloodlust)
Trinity Force 200% base atack (When you first use Q + E, Q, E, R)
I played against a Jarvan 4 with a build similar to the tank are major differences.
In many critical cases jarvan is better to attack than to run
Do not use the ultimate when you do not raise the enemy with e + q, can easily use flash, your ultimate was useless
- Do not focus on < W > skills, Many when I see the jarvan, we know it will focus more on the tank.
- you play ad / tank when you're the only one in the team.
- Play with jarvan pleasure and listen to music like battle.
- Use E+Q before R
- I hate when I see a jarvan skin and does not know how to play. :( Play Video

Depending on the situation when you play ranked or draft you know who you are fighting you choose 1 of the 2 bloodlust or fervor.
At first it is better than bloodlust, bloodlust is very good, we had situations when we caught on the middle tower 3 Jax, Jhin, Vayne every first blow with martial cadence we had lifesteal 15%
Why not choose thunderlord, it is only necessary in some cases when the target has a little hp and you are using the demancian standart

Jarvan is very good in rapid attack fighting, is not effective in long-term fighting.
Jarvan 4 E+Q can block skills and only used at the same time with R Yasuo, R Darius , Q Master , W Tristana , R Miss Fortune , R Jhin ,
You can use the flash if you missed the target with e + q (flash makes the target jump up).
You can cross the walls of 2x than the flash, you can also stun the Kayn when you want to pass through that wall.
When a champion who has a low life, jarvan has 100% to catch him, always use the ultimate end, every player does anything to escape, often in important moments you can not control and concentration, use in settings Play to give e + q in the direction and not the target, use the automatic attack, you can often miss the chance to pass the passive critical after the ultimate or e + q.

I chose the champion at the end, the controversy is starting with the jarvan.
In ranked, jarvan is considered as not having much damage, because he is a tank.
I play for pleasure, with a jarvan I feel in my skin, like a real champion on the battlefield.

I chose a jarvan supp in the table, because it's very good against ADC, Easy to catch and powerful at the same time.
Jarvan 4 can beat adc and supp at the same time and when I beat up with the best of them in the enemy team, escape and run and do not understand where so much damage in so short time.
- Use E+Q before R ,(quickly deactivates after use when you fight vs vayne at lv 6-12)
The enemy team does not give the importance of jarvan, thinks it weak, and when they choose full dmg support, are shocked and amazed, they write ..wtf wtf dmg ...

Many people describe the tactical system but not really if they merge into the game.
It happens anyway when you lose, but this champion never comes out with a bad score against the rest of the team.Has happened many times, and I think, a champion has left his game intentionally spoils the game.
A secret that many players do not know, the surprise is bigger when playing normally, but when it's ranked and especially see what the enemy team, the combo is most important, if your favorite champion is chosen or banned and have a bigger advantage over your team , jarvan is one of the champions who make the difference, when you see in the 2/3 tank you are doing full ad lifesteal, even when there are many adc.
Carefully calculate each damage and skill as you enter the battlefield.