You shouldn't be first pick in ranked consecutively to avoid counter picks..
It's kinda stupid that you are able to consistently get first pick in ranked leaving you open for counter picking...I mean there should be some algothrim that prevents that.
so the best way to not get counteredpicked is hover other mid champions then at 7-10 second mark you pick swain, the chances that the enemy will definitely think you are mid lane unless they suspect you are trying to fool them etc.