Recently I've been having GREAT success - with my All-Star team. And I mean that literally. All Iron Starlets. Dynamo, Dynamax and Dynamite!
Three Iron Starlets, all with Wind Up, Speedball, and supercharge.
There's a LOT of PVE and PVP application for this team-up.
PVE there's quite a few Menagerie fights I can destroy with no prob with those three:
Quintessence of Light (surprisingly!)
The two warthogs
I'm sure there's a few others I'm forgetting ATM...
Likewise two iron stars can duo Jeremy Feasel at the DMF no problem. I've also used two iron stars to duo the trainer up in the mountains of Kun-Lai.
PVP wise I tend to win 2 out of every 3 battles it seems... of course the bane/nemesis of this troop are Elementals. Particularly pains are the Tiny Snowman and the Terroclaw Hatchling. Both of these can solo my entire starlete team no problem, so it gets annoying - especially as a lot of people have a Terroclaw Hatchling in their lineups >_<
On the flipside though, most everything else gets wrecked big-time! One particular guy started his fight with Xu-Fu, and in three rounds I killed him and he surrendered. What was great is I ran into him four times in a row later after perfecting another team, and managed to get my 5-in-a-row with all three pets alive achievment! It was total cheese to get it with that team (as rarely all three are ever alive at the end of a batte) - but hey, i'll take it!
I wrote in another thread where people were discussing how "OP" the new Graves pet is - and I have yet to encounter a team with Graves my Starlet trio couldn't take out easily. Particularly graves as I can kill him before my first starlet goes down no problem.