In 87 there were basically two trusted relievers: Reardon and Berenguer.
In 91 there were basically two trusted relievers: Aguilera and Willis.
Pretty much the rest were cobbled together. It happens; sometimes it works. Of course, most times it doesn’t. And teams didn’t lean on the bullpen as heavily as they do now.
I’d still estimate 3-4 is the best one can expect.