ok so if a right hander is fighting as south paw. do you still circle left

You circle to your left, if he's a south paw yes. Just stay away from the power hand basically.

Just to add to it, the best combo against a southpaw is the right hand left hook right hand.

You circle to your left, if he's a south paw yes. Just stay away from the power hand basically.
like winky he is a south paw but his strong hand is his right. circleing left will get you caught with his strong hand jab

Well I hope you have good defense to take on the jab. But his power can be his downfall proper defense like parry can easily get his momentum getting him caught.

By The way Winky Wright actually is a right hander..He does everything except box with his right hand..