There should be an incentive for Jarvan to dunk more than one target
I feel like a lot of the time Jarvan is disincentivized from dunking more than one person. What if he got some short defensive buff for dunking people? I mean i know the idea on his W is to get more shield for hitting more people, but i feel like unless it's a guaranteed win in the teamfight, Jarvan puts himself at risk for getting focused. A lot of champs like Malphite or Wukong's ult does enough damage and has enough CC to justify hitting a lot of people. Too many times Jarvan will ult and hit one target and just die.
What could Jarvan get that would incentivize him to dunk more than one target?