243a0200_ne_Arena_Strategy___Blue_is_Me__Advantages
[Name] High Templar [Disadvantages] Needs strong micro-ing and resources to level. Weak against warp zealots and cracklings. [Advantages] 
Psi-storm, which is good versus any unit, especially bio units such as marines and zerglings.
Starcraft 2: Marine Arena Strategy | Blue is Me
Advantages