I have a 55 guardian, shadow and sniper. On ToFN, for me its a mix on which side wins the most. If on sniper and I go against Coral, MvP, Tatoo Inn or Republic of Sweden, unless its an organised pug or part imp premade it's usually a loss.
On Rep if I see White Noise, QQ, IRS, UNLEASHED same applies as above.
Pug vs pug is usually random on win/loss ratio.