I don't really see the point in fishing for cards for Seals to boost Divination in this system.
Outside of Savage, is there really any difference between 3% and 6%?
Two drops in an ocean is as noticable as one.

Even when optimising, it may not be worth the trouble if redrawing could waste time and potentially result in a worse card anyway.
Your best targets for cards are still your top damage dealers, if your party consists of say, Nin, Sam, Dnc, Rdm, then the clear winner is SAM and you'll want your melee cards every time.