http://forum.naruto.oasgames.com/en/forum.php?mod=viewthread&tid=20979&highlight=140

The post above has a collection of guides to clear 140. It's recommended to clear it with earth main, as you can see later on only requires 52k power to clear compared to the other mains. (Of course, you can come up with your own lineup at a lower power)

Change your life magatamas around to let Lee have higher HP than kurenai. (can consider removing HP magatamas for kurenai if needed)
You can try mooding too if the HP difference is small.