My mate has a 7 year old pere x saker that takes crows from the fist and waits on for game, i dont see the point in flying game off the fist with a longwing, but anyway, you need to pick one discipline first like off the fist crow hawking, then the following season you could train it be a gamehawk and the possibly in the 3rd season you could switch between the two styles.
You will have an allround bird but it will be a jack of all trades, master of none and basically it will be a checky gamehawk, there are loads of birds like this that people get rid of because they cant stop it checking a