I tried using wtfast trial. server texas 4. still feel the lagginess. then i tried pingzapper trial, only then my combo feel smooth. though on paper the ping almost the same. i dunno what went wrong with wtfast. so i just sub pingzapper 30 days for $4.

first u need to dl 15 gb installation file. usually major updates file also quite big. yesterday update files size was 3.2gb.
but only playing the game wont take much bandwidth. 1gb should be enough.