we know that  the act of bonding a warder imparts with  with  special benefits  increased stamina  etc do these  benefits stack?  im thinking of rand in paticular since he is  the only one I know of in this series to  be bonded  my several channelers is it possible that he is " super charged" from  being bonded  by  3  seperate channelers ( leaving min out  for obvious reasons.)

Short answer: No.

This was discussed not too long ago.  RJ flat out said that Rand did not receive any extra "benefits" by being bonded to more than one Aes Sedai.