Is Assassin Viable

Assassin is the middle ground class. It's very viable due to that. It does less damage than archer endgame unless you really try to make an amazing damage build. But it does enough damage that it's not stupidly weak in comparison.
The survivability is there due to vanish pretty much disabling most normal attacks. It's only actual downside is that it's a close ranged class meaning the push spell becomes it's worst enemy. (it's only ranged spell will go a decent range but isn't reliable for the main damage)