I can't wait to see your post Yanman.be.
Anyway, until he posts it, here are things to consider:
How will you play your Assassin - Do not be a tank, do not stand there and get hit.
Until you get used to your Assassin, this is what I did:
A/Mo (Assassin/Monk) - using retribution as my enchantment and using Golden Lotus Strike for my e-management. That was until I had a good enchantment from my Assassin.
A/N (Assassin/Necromancer) - I changed my profession to this so I can get a good long duration hex so I could use Black Lotus Strike. I used this so I can get to my dual attacks faster and for e-management. Once I had a good hex from my Assassin, I changed again.
A/W (Assassin/Warrior) - Currently, this is my character. I use Wild Blow to remove defensive stances and to re-new Critical Defenses. Critical hits from Wild Blow, also gives me energy and health from Way of Perfection.
Pure Assassin you'll figure out is the best way to go. Just remember, assassins do not have hex removals, and have weaker armor than a Warrior.
Good luck!