We all know that with edges assassins just OP. (Poor Umiron fixed one edge and forgot about others, because when you don't play mortals you don't see simple things about the balance, instead he fixed OP wrath, lol).
But the thing is, that nobody will fight you 1 vs 1, because again that class with edges is just OP. (yea yea, with my last char, I saw how two imperials bard+warr just suicided on Tiiga, I was the third one and just walked away, it was pretty funny.)
So people would just gank you down (strange that it didn't happen to Tiiga, however I saw him died on Sirelias solo) or avoid you.
And here the assassinate comes into the play. You don't need that one round to permalag the person. You just need to hit the 'assassinate' button to win.
But again, in my case, peoples just mass rolled tribunals and were sitting in the cities telling the whole range (BERONT IS AWAKE, and it was funny as hell).
To sum it up:
Against the stupid playerbase - the warrior like assassin is better. Against the smart playerbase - the assassinate like assassin is better. Against mass alt tribs - the warrior like assassin, who doesn't care about laws - is better.