with a half life as long as deca, i cant see the reason or point only going 8-10 weeks... im all about shorter cycles though and thats why you may want to consider going with npp and that way you can run it 8-10 weeks but i wouldnt run deca less than 12 weeks if you go that option... you just wont get the most out of it... i much more prefer keeping cycles shorter though so thats why i would consider using npp