deca and sus cycle pct advice needed, please help!

age-22
bf-15
height-6ft
weight-14 stones

this is the cycle i intend on running_
deca 400mg-wk 1-10
sus 500mg-wk1-12

and for pct ive been told to run nolvadex and clomid, but to start this 18-21 days after last shot of sus...is this right?
and ive been told that HCG is only really neccesary if your hitting over 1000mg a week is this true, or would you guys include hcg for the cycle, if so could you let me know to when and how i should use it, as ive never used it before...

i plan on shootin monday and thursdays...250 of sus and 200 deca each day....would it be ok to mix the both and inject 4 mil or should i do 2 seperate jabs?