Full offensive kill potential.
Burst damage and target access
Hitting a champion with 3 separate attacks or abilities in 2s deals bonus adaptive damage.
Gain a burst of Lethality and Magic Penetration after using a dash, leap, blink, teleport, or on leaving stealth.
Collect eyeballs for champion and ward takedowns. Gain permanent AD or AP, Adaptive for each eyeball plus bonus upon collection completion.
Unique champion takedowns grant permanent out of combat MS.
Improved attacks and sustained damage
Takedowns restore health and grant bonus gold.
Takedowns on enemies grant permanent Attack Speed.
+9% Attack Speed
+6 AD or 10 AP
Jarvan makes excellent use of Electrocute in all scenarios as his [W] count as a hit ability, so a basic combo at level 3 procs it.
Both Jarvan's [E] + [Q] combo and [R] proc the bonus lethality for more kill potential.
Placing pinks and clearing wards is key to any successful Jungler, so why not earn some AD in the process?
Getting around the map to join fights and match roams is important as any Jungler.
The bonus healing from Triumph allows you to dive the backline for the quick assassination kill and survive with enough health to get out.
More Attack Speed means a faster and healthier jungle clear resulting in earlier and more often ganks.