In Happy Jack I run a rotation with:
SP1: 15/92 DUR/STA
SP2: 33/77
SP3: 23/75
SP4: 24/82
Tandem 1a: 29/64
Tandem 1b: 24/74
Tandem 2a: 21/73
Tandem 2b: 25/62
SP1 gets no pitch count with a pull rating of 4. Ditto for SP2. Tandems 1 and 3 get PC of 60 with pull of 1, Tandem 2 gets PC 65 with pull 1 and Tandem 4 gets 55 and 1.
I run a 4 man rotation: SP1, SP2, T1a/T1b, T2a/T2b with SP3 and SP4 filling in for the other two starters when they go long games.
So that is a 4-spot rotation with 2 of the spots being tandems. It worked well this past season (I won 101 games) but requires you to check in at least once a day to shuffle some pitchers.