Its hard to beat anyone who is crafty - I love fighting southpaws cause I am one and I find it more challenging for me - but you could be right handed and still be a great crafty orthodox fighter which is like watching a SP fight his mirror image - just be able to read your opponents nove and stay in certain positions to counter

The key to winning any skilled fighter is to just keep pounding them - never be intimidated even if they are bigger,stronger,faster - have heart