True bones thanks. Sorry I'll differentiate between fact, theory and my experiences. Rushed through too much.
Testosterone works on mixed activity both AR (Androgen Receptor) mediated and non AR mediated.
Deca is mostly AR mediated and dbol is mostly Non AR mediated.
Most compunds are heavily biased in one direction when it comes to building muscle (AR or non AR) this is why testosterone works so well milligram for milligram compared to everything else as you get more overall growth when you have both types of activity.
Deca + Dbol = AR mediated activation + Non AR mediated activation this is why this combination works well but now you can see if test has both...You can take just test for good overall growth and a simpler cycle and easier to control sides.
You can control the water retention of test and dbol both with adex and gyno with nolva.
For deca water retention some say letro is the best and adex doesnt help alot, some say adex helps, its a bit of a mixed bag conversion to estrogen being quite low but water retention still being there. Gyno from Deca is not so simple either.
Whether prolactin, progestanaic or somehow estrogen related nolva/adex seems not to help in most cases. Caber and bromo seem to be used alot but maybe someone with more experience on Deca and deca gyno can help the op with advice here, I havnt had experience with this.
The objest is to prevent gyno at all costs so you want to have these things on hand at least!
The quality of gains in both cases will probably be somewhat watery depending how your body takes the compounds so you probably want to take ancilarys to reduce estrogen+water retention so you are more solid (these are AI's-aromatase inhibitors).
Sexually when on a test cycle everything works fine (better actually as long as your estrogen is not too high or too low) but when using dbol as prime androgen i myself personally am up and down depending when I take the tablets = its not consistent. Sometimes it was difficult for me to ejaculate and stay hard at certain times throughout the day/night if having sex.
I suspect this is because of the short half life of the dbol and fluctuating blood levels but cant be 100%.
If you do a deca+dbol cycle, deca is not very androgenic so probably wont support your sexual ability and your body will rely then most likely on the dbol for that as your natural test will be shutdown.
Recovery can apparently be difficult after a deca cycle as well. Again something I havent experienced but maybe soeone else can fill in some deca pct info for the op.
And 1st cycle + the potential complications of a dbol+deca cycle = bad idea.
Test or test+dbol if you must would be the better options.