For the Leaf cells I've always used 4c continuous and 9c peak, which is what Hybrid Auto Center states. That would allow 2p. Remember that Enerdel 2p would be 35Ah, while Leaf 2p would be 62Ah... not exactly apples to apples.
For the capacity I am after (~29kWh) I would need 6p Leaf cells anyway, for capacity not peak current.
Remember, the temp rise of the bus bars at peak current is probably much less than the temp rise of the cells! I just need to keep it mind. I am thinking of implementing cooling via these
Wakefield-Vette cooling plates.