Assasins

[Jack_Trowell]

Oh almost forgot : Shinuyama and Jomon both have assassins too.

The bakemono assassin seams weak, but with fear it can sometimes root an opponent that would have won the fight else.

And ninja have awesome stats (some of the best base attack and defence values in the game, as well as good precision) and get poisoned shurikens that can kill your target before it get to you.

Add some cheap magic items if needed and you have a ninja thug ^_^

[Manuk]

ctis and rlieh have assasins-mages.
machaka has a high cost superior assasin.

so:

Marignon, Phytium and Ermor - Assasin (also you get this by random events and a special site)
Abysia - Slayer
Jomon - Ninja
Machaka - Spider Warrior (not sure abour the name)
Rlieh - Star child
Ctis - Empoisoner
Mictlan - Lord of the Night

Also theres one from random events. An common assasin like ermor's but equipped with a ethereal robe, from a nation called "Elludia"

[Nick_K]

I'm just going by memory from Dom2 here, but I think Machaka's Spider Warriors are the stealth troop rather than the assassin. I think the assasin is called the 'Bane Spider'. You can get the ethereal assassin from a rare astral site as well (The hidden city of Elludia)

[Gandalf Parker]

Arcos also has a seducer unit. Its not quite assassination but can be more fun (except that it doesnt work on females)

[Frostmourne27]

Are there any summonable assassins? There are certainly several seducers/corruptors, but what about plain old assassins?

[Teraswaerto]

Lanka and Mictlan have national assassin summons. Wishing for a Lord of the Night is an assassin summon of sorts.