tyvm for info

so i have narrowed it down to jedi knight/ Sith warrior Leaning more to sith but anyway i only really know guardian Vigilance up to level 50 what are the other spec's like? Like is watchmen blowing all other jedi knight spec out of the water, is it really complicated, or is concentration a middle ground of difficulty and still good single and aoe damage? Insight into the specs would be helpful.