Me/W, effective build or overrated?

[The Tyblat]

im thinkin about makin one but ive played arena for 3 straight days, met about 20 of them in my games, and they ALL SUCKED!
a few hits from my lightning or with my warrior/Mo drops em.... their armor sucks?
please give me some advice if i sohuld make one or not

[UndeadBehlial]

Me/W... what's the build?