19 and 49 altought I think 49 sucks, not the actuall comunity, I give them tumbs up but the playstyle of the bracket sucks. Blackout EU (19 and 49) still get games (even thought 19 get games every day and not 49).
Also 60 and 70 on vanilla/bc account is always a way to get "twink" games (but before doing this you should always look if there's enought games for you in your battlegroup).