[Zeldor]

You cannot target land provs with voice of tiamat.

Only one water queen is amphibian and she is cool. But you lost 100gems if you summon 2 aquatics in a small lake. They cannot get on land even with fish amulet afaik.

Water-breathing gear gives poor amphibian ability, so check that for fatigue etc. There is reduced AP, so less damage from lances.

The most important resist uw is probably poison, many units have things like poison barbs - nasty things. 2nd is ice. But remember that it does not protect from Encase in Ice [great spell to own SCs by time limit] - target won't take damage but it will get stopped.