If I am on the button and there are three or more limpers in front of me... i will play 54,65,67 suited or unsuited.
But my favorite semi rag hands to play are 89s or j9suited if I can get in cheap.. J4 in the BB is my lucky hand. I have flopped two pair or the boat several times. Of course I do not call a raise with it. Ive also had luck many times with the bb special of 85 and 32.
The hands I find even more useless then 72 is 92 or K2