Deekay i play in the same bg as you and i would recomend you to play monday/tuesday evening for rating.

Sunday evening is by the far hardest day to play but its nice training, the last sunday i played i lost 75% of the games i played but i went up about 30 rating due to them beeing 2300-2400 in matchmaking value.

Misery is a big battlegroup and if you play 15:00 any day you pretty much face atleast 4-5 teams even at my rating.