I've been reworking the skeleton abilities in T3nd0's Skyrim Redone mod, I love gathering bones to raise skeletons, but there we some issues;

Having lots of permanent skeletons was a nightmare, especially in tight areas
Late game skeleton resources can be scarce


Here's how skeletons work now:

Skeletons die Slowly, losing 2.5 health every second

Perk Bone Mastery level 1 grants the skill Summon Skeleton, allowing the player to use the required materials and summon 1 Skeleton Warrior
Perk Bone Mastery level 2 allows more bones to be harvested from skeletons
Perk Bone Mastery level 3 allows Summon Skeleton to summon 1 Skeleton Warrior and 1 Skeleton Archer
Perk Bone Mastery level 4 allows even more bones to be harvested from skeletons
Perk Bone Mastery level 5 allows Summon Skeleton to summon 1 Skeleton Warrior, 1 Skeleton Archer, and 1 Skeleton Mage
Perk Bone Mastery level 6 gives skeletons more health (This allows skeletons to take more damage and live longer)

Skeletons no longer attack everyone when summoned



The reason I did this was because, while skeletons hoards were epic and amazing, having them all the time was a serious pain in the ass, especially indoors when your available movement space is very limited, and just putting them on a timer made the skill too weak since they require a lot of materials, so instead, increasing the amount of skeletons raised with every other level while keeping the same materials allows for more expendable skeletons, and as every necromancer knows, skeletons should be very expendable!

Summon as many skeletons as you want, enjoy your amazing skeleton hoards without being burdoned every time you go indoors

Remember: This (obviously) requires Skyrim Redone, make sure it's loaded after skyre_main.esp http://skyrim.nexusmods.com/mods/9286