Firbolg

[Graeme Dice]

While a wraithlord costs the same as 4 summonings of tartarian titans, it will also easily defeat all four in combat if they aren't commanders.

[Shovah32]

Graeme Dice said:
While a wraithlord costs the same as 4 summonings of tartarian titans, it will also easily defeat all four in combat if they aren't commanders.

Thats probably not always going to be right.

[Nick_K]

Quite a few of the tartarians have magic weapons as standard, so I imagine they could seriously challenge the wraith lord. The wraith lord's price probably includes a hefty cost for the immortality though