[Shovah32]

The main balancing factor of tartarians is that they need a mage with 7 death magic to summon them which means that without huge investment/design points+pretender time its hard to get them, let alone in large numbers.

D3 mage with skull staff, skullface, ring of wizardry and ring of sorcery - 30 death gems and 100 astral pearls iirc

D4 mage with skullface, skullstaff and ring of sorcery - 30 death gems and 40 astral pearls iirc

D5 mage(rare, probably either pretender/D3 mage with 110% random that includes death which requires alot of luck) with skullface and skull staff - 30 death gems, hard to get

D6 mage with skullface - 10 death gems, either pretender or one of the previous mages empowered in death

D7 mage - Pretender/one of previous with empowerment

note: boosters could be swapped for levels of empowerment in death.