I guess it depends on how you play him. I used to jungle him with full armour pen and madred's (now probablyi spirit stone) into brutalizer.

May I join this little discussion? I have played J4 a lot myself in ranked so I hope I can explain what really is best:

Attack speed marks are best when going madreds-wriggle's because it simply increases your clear speed by giving you more procs.
I think his marks are good, but not when paired with madreds. It would if he went for spirit stone.

HOWEVER, I don't like AD quints on J4 because movespeed quints are just better :)

It's still a very marginal damage increase at the expense of clear speed.

Laggermeister is getting GMD'd overhere :D

Wrong it's physical damage and hence it scales with armour pen.

He does, however, thanks to Dragon Strike, make great use of Armour Penetration runes. Though having a bit ad in runes speeds up your clearing times in comparison to using full armour pen.

I would agree with you, but the issue is that Jarvan IV makes very poor use of AD runes and is hence an exception to this rule of thumb.

What if I told you AD runes are not a factor in 'waay more burst'? Your greatly increased burst is dependent on ONE factor and one factor ONLY - maxing Q over E. If you are bent on a ganking strategy and every little bit helps then yes AD runes would help you achieve your ganks, but AD runes only give marginally more burst and are all round inferior.

The facts are that Jarvan has ****ty scalings, including AD scalings on only two skills, one of which is his ultimate. So before level 6, that's only one skill which benefits from AD runes. Most notably, Martial Cadence doesn't scale with anything.

3 AD runes and 3 AD quints give some 10 AD (with about 8 flat arpen). That's 12 extra damage on Dragon Strike and exactly 10 extra autoattack damage because no bonus to passive. Sure, the flat arpen will synergize with Q's armor shred but again as I say, it is completely dependent on maxing Q first. The flat AD bonus will be outscaled incredibly quickly and not provide enough bang for the buck. A Long Sword is already 10 AD.

Superior how? In terms of clearing or terms of damage? If it's the first, then I'm gonna tell you that clearing the jungle isn't all a jungler does and if it's the second I'd like to see some math because I'm pretty darn sure that this setup gives him waay more burst.

By that you mean runes are okay, even though attack speed reds are clearly superior. Movement speed quints may not be essential but pure AD/arpen is a no.

yeah same with them. but i think maxing Q is better when ganking as this have lower cooldown (you can use it more times in a gank), burns enemy armor (useful when ganking with an allied AD champ) and deals more damage. but if you would just want to clear jungle faster and won't gank then go with the demacian standard max.

Thanks for the feedback, will be noticed and tested out. :)