Assuming gains are your priority, its not even a question which method to use.....pick the 1-2 injectables and the oral that works best with your body, in terms of maximal muscle gains and minimal side effects. Run the injectables year-round, and use the oral 4 weeks on, 4 weeks off.
For me, I'd run test & deca, with maybe dbol or tbol as my orals. Some prefer eq/tren instead of deca, others prefer no test at all, some prefer test only. Find out which drugs work best for YOU..... at that point, your size will mostly be a factor of dosages.
Credit goes to Disgusted for the aforementioned approach