[Nagot Gick Fel]

Originally posted by Boron:
if you can manage to kill the trolls in suicide attacks after 5-10 turns but keep your troll kings it's most likely ok but if you keep them longer you will notice your unneeded additional upkeep badly .

Hmmm, Sea Trolls cost 50, regular Trolls cost 60. That's about the price of a Knight - eg, 60 for Man, 70 for Ulm. Compared to the Trolls, the knights' upkeep are similar or slightly higher.

So from what you say I have to conclude you either don't recruit knights when one of these nations, or if you do you try to suicide them at the first opportunity.