http://wtfast.com/ is an awesome service - it is always fast/stable for me. Using WTFast I can consistently lower my ping down to about 25ms to 50ms whenever I play. (normally around 150ms to 300ms) It makes a huge difference to help me get interrupts off, stop guys from LOSing, etc. I notice it also really helps to boost my DPS in raids since rotations are alot cleaner.