If you want a 14 week cycle, that's fine. Your recovery may be more difficult though. But the deca should be used the whole 14 weeks. 8 weeks it too short for deca IMO...
Cyp anywhere from 8 weeks on is long enough.
If you are using deca I would keep it 14 weeks. Also, do a stasis period following the end of the cycle since you are using deca. A lot of guys I know prefer this. Just 100mg a week for few weeks. Then you could do a taper and add a serm.
The stasis+taper+serm seems to be the favorite way to go among my group of friends that use, when they use a 19-nor (for my friends that actually come off anyway)
If you decide to exclude the deca, then I would shorten the cycle to 8 weeks with a frontload of cyp.