In the Tales from the Yawning Portal, they introduced a variety of new undead creatures and future adventure Tomb of Annihilation may also introduce more types of undead. However, reading the Tales from the Yawning Portal on page 236 contains the Giant Skeleton which relates to a past question I had regarding Animating undead creatures beyond the spells restrictions?
Now that a Giant Skeleton is considered official content I was wondering if it was possible to control this creature somehow using the spell Animate Dead (or possibly Create Undead).
Some ideas to I was working with was comparing challange rating to regular skeletons and establising to control a Giant Skeleton you must sacrifice a certain number of Skeletons equal to the Giant Skeleton's CR which is a CR of 7 or 2900 XP. For standard scaled CR that would be 15 skeletons needed to control a Giant Skeleton or considering soley XP, that would be 50 Skeleton's needed to control a Giant Skeleton. This way it would be possible to control other undead such as the MM Crawling Claw just by scaling these values.
So would a system like this sound balanced and fair? If not what other systems could allow a necromancer to control different types of undead such as the new Giant Skeleton in the Tales from the Yawning Portal?