I typically run one oral at a time (not including proviron).
mg per mg orals tend to be more effective, so long as you can tolerate them.
a 'proper' cycle IMO would consist of test, another injectable such as npp, tren, or masteron, and an oral such as dbol, drol, winny, oral tren, or tbol.
that being said... if I was on test and could afford to add only one more drug, i'd add an injectable 2nd, and an oral 3rd. (if that makes sense).
are the necessary? not really, imo. there are some 'coaches' who are huge fans of orals. o'reagan is talked about a lot lately because of bostin Lloyd's comments on youtube.
there's only sooooo many spots you can inject each week, and if your test is only 200mg/ml and you wanna hit 3g test, plus a gram of another injectable that's 100mg/ml or even 150mg/ml, that's 15cc of test plus 6-10cc of the other stuff... that gets to be a lot of oil, and if you're shooting for over 4g/wk, upwards of 5-7g, you gotta make that up in orals 700-1050-1500mg per week sometimes.