I was just curious more than anything. Are you F2P? The problem is that he may work for you now, but if you are spending any money at all, I would start getting his shard packed when you get the chance, because you won't be able to farm and level him up for a long time. I just unlocked his node a few days ago and I very been at level cap for a few months. At 4 stars (3?) he will become a liability when everyone has 7 star rebel squads etc.
It looks like you found the Empire discussion, user @Smapty has posted some videos of his squad with Krennic, he seems to be doing the best with him at the moment.