None one knows 100% yet, but basically you want really high skill maximums for Accuracy, Power and Consistency. 80'ish+. You'll want at least 40 heart. That's about it. If he's doing kickoffs, you may want a little conditioning if he takes some block damage. I'm unsure if 100% stamina helps a kick, I assume not, but we don't know yet. Morale will definately affect accuracy so heart is good in case your kicker gets pancaked on a kickoff play, or he misses one.