im looking at doing a grappling discipline (aikido,hapkido,judo,jiu jitsu or ? ) as part of training for next rugby league season so im not very interested in submission or ground fighting more grapling and take downs. what do people believe would be the besy discipline for me? i will be doing my normal weights and cardio and picking up a stand-up technique at the same time probably boxing or kick boxing my aim is to improve my rugby first and foremost. and secondly to become a better real world fighter/street fighter for selfe defense.