C Light
Artic Cheetah ACH-B (Red Hot)
This build is my light mech of choice for scout matches.
ECM
4 Small Pulse Lasers
3 Added Double Heat Sinks.
http://mwo.smurfy-net.de/mechlab#i=293&l=d9e5726b439963a4403412287b3f0b3565b1d56c
Mech is able to keep up a steady stream of accurate close range fire. ECM keeps hidden and able to sneak past enemy mechs who are not scanning visually.