If you're going to put so much thought into your fist run and creating the optimal Morgan from Lon'Qu, the best skills for Morgan should consist of: galeforce (passed down by mother), limit breaker (DLC skill), Astra/Lethality (Lon'Qu's), Armsthrift, and the rest should be up to you.
Also, a male Morgan will be unable to become a dark flier. Instead, he could be a Dark Knight. Lifetaker is a pretty good skill to have and it's achieved at lvl 15 of Dark Knight.