Happy Wars

This achievement requires you to get the most kills as well as the least deaths in the SAME match. Contrary to what many players may think, 

THIS ACHIEVEMENT HAS NOTHING TO DO WITH GETTING MVP IN A MATCH!

Getting MVP in a match and the MVP achievement/quest are completely unrelated. You also can NOT tie with someone else for kills or deaths or the achievement will not unlock.

To check how many kills and deaths everyone in the match has, hit  and then .  To make this achievement easier for you, try having a friend with you in the match play as a cleric so they can heal you, keep you safe, and check periodically the stats in the game for you to make sure you have the most kills and least deaths.