243a0200_ne_Arena_Strategy___Blue_is_Me__Advantages
[Name] Dark Templar [Disadvantages] Needs strong micro-ing and resources to level. Weak against fast units such as warp zealots and cracklings. [Advantages] 
Cloaked. Can be leveled and if micro-ed well, good at harassing. Good against light units.
Starcraft 2: Marine Arena Strategy | Blue is Me
Advantages