I think dbol and mdrol would be the best choice for a pulse, because they bind less to the androgen receptor. Dbol would be the best choice and pplex would be the worst. As far as stocking anything, i have no idea. Haven't tried any of this pulsing at all and i never used dbol or mdrol. As as far as i can tell not too many people stack compounds in a pulse.
If I was going to pulse i would probably pick dbol and run it 3x a week at a relatively high dose. Either mon tues wed, or mon wed, fri.