well, according to some of the ep3 rumors, there may be clone factories all over coruscant and the republic. however there are countless planets so how about we agree to disagree, using growth acceleration and jango's decaying DNA as a proof and say that most stormtroopers are clones but many are conscripted civilians from caridia. The scouts are all civillians thus explaining their disorganized behavior in ROJ. Most civillian troopers are scouts or commanding stormtroopers. civillians can advance in rank. clones cannot. The Special forces or ARC Troopers are trained with force pikes and double bladed sabers and then become the imperial guard (i base this on infinities which featured the roya guard using double bladed sabers). how's that for a theory?