Tactical Trooper or Deadly Chaser Class?(Elsword)

I have heard many things about this game called Elsword which my friends are talking about and recommending it. After many times of asking me to give the game a chance, I have decided to give it a try. I'm thinking of playing Chung and picking Tactical Trooper or Deadly Chaser out of all the characters available because I think they look cool. Please help I can't decide! Can you give me some suggestions and advice about those two classes please? I heard they are good in their own ways but I can't decide >.<.

Here's a link related to Elsword and Deadly Chaser :
http://b-slotfordc.blogspot.com.au/2015/05/does-dc-need-b-slotelsword.html