open few shop page and make order on them and write all info at one time ,( different shop site with different amount , example one for order with $10 , one for $30 , one for $50 and ... etc)
just leave 16 digital cc numbers and expire date with cvv2
so now wait for a good cc and fast copy and paste cc info (no address , name .... if you want use public ccs very fast also in some shop site you need only have correct cc zip code for USA ccs / Canada so some that have avs check)
also for public ccs is better you find some easy shop page that not need to pass 3d and accept all kind ccs, otherwise you must know which ccs have 3d or which are non vbv / no msc (from ccs bins)
on this job you must have very fast fingers otherwise other peoples will use ccs before you and you will always get declined at payment and you will think all ccs are dead same many noobs ,
but is not true because a lot smart cc killer daily kill huge ccs without talk .. just some of them post reply about working ccs , so be smart with fast finger's and always open and ready few shop site for fast use good ccs.