We have skill modifiers? Then fine here it comes
A skill modifier that turns all skeletons into 1 giant skeleton which resembles big dic*ed Outsider in Titan quest. Admit it, we all missed Outsider =) An idea is stolen from D3 Zombie hounds and mashing it with Titan quest. Enjoy possible the mod in your mind.
Or we could get even more creative.
Dual Wield Skeletons.
Come on, everybody missed outsider from TQ =)
How would it work though?
If A: the big spooky skeleton stat = the sum of all 10 potential skeletons, then you just created the most OP summon in existence with 300k health.
B: the big spooky skeleton has less hp and damage than 10 skeletons, then why bother?