Such a kind of skill stealing ray would sure come in handy and there are a ton of attributes to choose from. I likely wouldn't primarily go for the on-ice ones though, but certain off-ice characteristics and physical abilities that you just can't learn, no matter how much you practice. So I would go for things like raw skating talent or size, a combination of the two would obviously be ideal, being 6'9 but still quick and dexterous like a petite figure skater. The most important "skill" to go for would probably be something else though: The favor of the sim gods, or if that one isn't available, the test simming ability and ruthlessness to break the game no matter at what cost for the rest of the league that some of the most successful GMs and coaches have shown over the years. Me and most other players just don't have that kind of selfishness, so it would be interesting to see how it feels to be one of them...