That's a very detailed analysis you have there GML! And I'm actually doing some of those pairings for IK, which should be good. Anyways, my first IK playthrough is gonna have a +spd/-Lck avatar who will marry Subaki. Some of you may already know that, but here are the possible skills for a Great Lord Matoi I'm thinking of
-Swordfaire (passed down by Subaki)
-Lancefaire (Passed down by avatar)
-Breaking Sky (A+ Shara)
-Vantage?
-Awakening?
That's my thoughts for her skill set. I'll do Kanna's on another day.