[Turin]

Well, I will happily trade 30 gp for 1 death gem in every mp game after ~turn15-20.
I used the seraph, because almost every nation has a special research unit, so it make sense to take an above average unit.

Usually the restricting factor when it comes to recruiting is lack of gold/gems, not the lack of usable labs. If you have to much gold to spend you can simply build more labs.