3v3

While leveling up my palas for my 5v5 team I was thinking of making some 3v3's out of the 5v5 team when wait times are long for 5v5.

I'll be running 2 guys with another player doing healing with either shaman, priest, drood healing.

Ill run different combinations of:

2x Retadin
1x Retadin+ 1x DK
1x Feral Drood+ 1x Ret

What do you think will be the better combination with either groups+w/e healer