I skipped the 8 between the 3 and the 2 of 32v . Corrected.
With LiFePo, there is a voltage penalty: 15% voltage loss that you have to compensate with extra LiFePo cells. For our application, many Li-Ion riders use 12 to 14s (44 to 50v to produce the 4000W required by the motor and decrease the Amps drawn), along with a 12 to 14p for 60-75min of riding time (75-80kg rider).
6Ah of capacity will give you sthg like 10 min of riding time under 44V
In addition to a voltage penalty, you have your assumed Ah penalty (2p) that announce a very low riding time.
If you were using Li-Ion cells like the Samsung 30Q (=3Ah each) 2p would mean 2x3Ah= 6Ah. Some guys have purposely dimensioned their battery to ride 30minutes (12s 6p) to save a few kg on board weight. Is it your goal ?
14s is a safety working limit in water.
The choice of 12 over 14s is also guided by an ESC limitation (a few cheap ESCs can’t work with 13s or 14s like he Flipsky FSESC 200A that flashes above 55v = just above 13s full charge of 4.2v each)
LifePo choice is interesting for the 2000 charge cycles offered compared with 400-500 of some Li-IOn cells. 15% less embedded energy traded for a much longer (4 to 5x) “life” expectancy.
Whatever your choice between Lifepo4 (which Ah btw ?) and Li-IOn (the benchmark seems to be the Samsung 30Q) it will be a good choice. 2p is a dead end for an efoil use (acceptable for an esurf for rare boosts though).