I'll have to give one of those a shot one of these days, itll be hard to purposely neglect my tamer though
If you have SoulStones, you could try (I would make them on Test Center TC1 and try them first) the following.
Lore:120
Taming:120
Magery:110
Necromancer:110
Meditation:100
SpiritSpeak:100
Focus:45-60
It is fairly easy to augment the above with Skill Mods from Jewelry and Items.
You could also substitute SpellWeaving for Necromancer. *Shrug* Might leave the SpiritSpeak as it is a fairly free and easy Heal or sub in Hiding, EvalInt (what I might do and take it to 110) or Chivalry.
Necromancer brings Offensive Spells and AnimateDead (3 helpers that do not consume a follower slot).
SpellWeaving brings Offensive Spells, Charm Humanoids, AutoResurrect Pet and You, Short Term Immune to Hostile Mobs, Heal Over Time, Natures Fury (1 slot summoned pet and I believe they implement pack instinct), Fey and its Evil Counterpart summoned pet.
While I listed more things for SpellWeaving that does not imply it is more powerful. At most it may simply indicate that from my perspective it may be more complimentary to a Tamer.
On the Other hand a Greater Dragon with 3 Animated Dead is probably better than a Greater Dragon alone. The higher the level of the corpse the higher the level of the Animated Dead up to I believe the maximum of a Skeletal Dragon. So you could have a Greater Draon+3 Skeletal Dragons.