I think orals are next to worthless for men -- and to answer another question, no, they are not c-17 alkylkated or anything else to improve bioavailability. There is a reason that there are no oral androgens (excepting c-17 aa'd) made by US pharmaceutical companies but two transdermals -- oral bioavailability is terrible for androgens -- around 1-3% vs probably 50% for intranasal.
If you truly do intranasal religiously -- 2 squirts per nostril with a metered pump every two hours, 4 squirts before bed and 4 more in the middle of the night (I used GHB to go back to sleep), they work as well as the topicals, but obviously this is inconvenient, to say the least.
I think the very best method is to use a trasdermal day and night, and use the intransal 30 minutes and 5 minutes before a workout for a CNS boost