Your problem, the reason your effects/results have fallen off, is one of receptor saturation.  Both products are absorbed at the same receptor level (Eph - all betas, Clen - the beta-2), so switching won't resolve the problem.  Coming off will work as in your proposed 2wk cycle method, but I've found that as the profile states cleansing/refreshing truly works, w/o the need for coming off.  A first generation anti-histamine like benadryl does this.  For more read the profile:
http://forums.steroid.com/showthread...le-Clenbuterol