Here are a few scenarios that I am planning on doing with all IP coupons (check the database). I'm assuming all Q's will double, but it's a YMMV.
Also, I need soap (and Dove is the brand DH likes), so I will be using that as a filler for most transactions. In those transactions, you could switch out the soap for something you want/need and it would probably make for less OOP. For me, I don't really care to have a trillion frostings that I'm not going to use--or donate--but I can use soap.

Lastly, I wanted to mention to check out the sticky on Catalinas. I have added some info in that thread just below the OP to help you maximize your savings.
#1
(6) BC Cookie Pouches @ $1.69 (shelf $14.34) – $.40/1 x2 = $5.34
(6) BC Frosting @ $1.69 (shelf $13.34) - $.50/1 x2 = $4.14
(1) Dove Soap @ $2.49 (shelf $2.99) = $2.49
OOP = $11.97, get back $15 cat
#2
(6) Progresso Broth @ $1.49 (shelf $16.14) - $.50/1 x2 = $2.94
(4) Pill. Toaster Strudel @ $1.99 (shelf $11.16) - $1/1 = $3.96
(1) Dove Soap @ $2.49 (shelf $2.99) = $2.49
OOP = $9.39, get back $15 cat
#3
(5) BC Cookie Pouches @ $1.69 (shelf $11.95) – $.40/1 x2 = $4.45
(2) BC Frosting @ $1.69 (shelf $4.38) - $.50/1 x2 = $1.38
(5) Gold Medal Flour @ $1.99 (shelf $13.95) - $.50/1 x2 (only have 4 Q’s) = $3.96
OOP = $9.79, get back $15 cat
#4
(6) Progresso Broth @ $1.49 (shelf $16.14) - $.50/1 x2 = $2.94
(6) Chex Mix @ $1.69 (shelf $16.14) - $.50/1 x2 = $4.14
OOP = $7.08, get back $15 cat