I also vote for the toe/heel lifts - I can't ride without unless my angles are below 30°.
F2 typically comes with one chunky lift and 4 canting shims. Those 4 can be stacked in opposing directions to cancel the cant and work as pure lift. That might be enough for the front toe. The single chunky one is enough for the back heel, for many people.
Then, some people riding the UPZ, say they need more front toe lift, than rear heel lift, due to steep internal ramp of UPZs.
But, there is no way to know what would feel good for you, before you set the board and do some "carpet carving".