Jaravan IV is a very good champion if used correctly his versatility, high damage potential and strong team fighting presence. A well played Jarvan is a scary adversary, bringing huge early and mid game damage and a strong late game transition to a tank and initiator. Even when behind, Jarvan can provide strong cc and be a good front line for his team.

Pros
•High damage
•Strong CC
•Strong initiation
•Useful when behind
•Decent jungle clear
•Versatile in terms of item builds
•Fits several different team comps, including AoE, initiation and single target pick comps

Cons
•Reliant on hitting EQ combo
•Doesn't scale into late game as well as some others
•Can become isolated if he dives onto the back line
•Has some mana problems

In summary, Jarvan IV is a strong and versatile champion, fitting several roles and can be picked into a plethora of team comps. An aggressive jungler, he has a strong early game, terrifying snowball potential, and even if he falls behind he can provide good utility for his team. Hopefully this guide will have given you enough information to take this terrifying force to solo queue and stomp your way to the top, leaving a 'Cataclysmic' trail of destruction in your wake.