The best part about this team is that it is extremely versatile, and can be built for the team you are facing. Also, all three of these hero's are rarely banned in ranked play allowing you to play this team consistently in ranked. In the ideal situation, kennen would solo top, while xin and jarvan duo lane bottom. This kennen build is a good solo lane build as you will 90% of the time have more life than the person you are laning against allowing you to most often than not get FB in lane. Jarvan and Xin also have a very strong lane presence as they both have knock up slow inication combos that work well with each other especially early game. This team is also good against jungle strats as both jarvan and xin can easily counter jungle. I like to solo bot kennen and have xin and jarvan top to keep jungle control and limit early ganks from their teams jungler. In terms of team fights, all three heros have large nuke capability and synergy with their standard iniciation combo, ending with jarvan ult trapping all their team to keep then in range of kennen and xin ults. Best of luck with this team, I hope I don't have to play you!