That's how im actually programming my cup draw..
We'r now in the knock out stage and whenever i check other teams they'r like 10Quality below me.
This tactics requires about 300tokens/season as long as you've got fast training guys.. ofc you could do it the regular way with a 5 star team, the result will be the same..
Whenever you decide to buy the 3stars guys, go for those 18 Y.o with lowest quality (0 or 5) ending so that you can use them for another 14-15 seasons and aplay the same tactics.
In 3-4 seasons thoes 3 stars would be uber low quality.. you would be getting even easier draws as long as you keep them in.
On day one i usually have to get a DL & GK for my top11 players, get some subs and u'r good to go.. i usually buy 5star players and keep them as substitutions then sell them in the end of the season and go back to basics like i started.