Resto Druid/Unholy Death Knight/Affliction Warlock 3v3: Although not the most popular comp out there, and despite many people thinking RLS is better, I feel that this setup is the easiest for a newer warlock to get into with the combination of druid heals, DK peels, and synergy with ebon plague with Warlock DoTs. Many teams, particularly in Europe, have shown this comp to be very successful on ladders already about RS gold.
Warrior/Resto Druid 2v2: Much like the Druid/DK 2v2 team, the warrior variant works just like it did in TBC with all the CC, HoT rolling and of course, spamstring. With the new addition of shattering throw, this comp can stand up to paladin teams rather well when they force a divine shield or bop. Not having a magic dispel makes matches against Death Knights extremely long typically because of chains of ice, however, they are also definitely winnable to get cheap runescape gold.
Death Knight/Warrior/Holy Paladin 3v3: This "TSG comp" is one of the easiest for a warrior to get into, since he is basically the MS bot for this team to get cheap runescape gold. All you really have to do in this setup is strap yourself to your DK, MS whatever target he is on, do not let yourself get bursted about cheap runescape gold, and voila, things die. Obviously there is more to it than that, but this is definitely one of the easier comps to get high rated with if you do not enjoy playing marathon 2v2 games as war/druid.
Hemorrhage: The complete sinister strike replacement. With heavy subtlety specs giving very high AP, hemo as an unnormalized instant attack has a higher damage per energy than even sinister strike with aggression. The de buff is as good as giving everyone on your team +10 grinding stones. The slower your weapon, better hemo performs about cheap runescape gold.