POS doesn't have much to offer, it has an OH which you can't combo off and 1 low with some sick range. POS db4 could count as an OH, but its slow and best used for combos
not only that you gotta burn 2 bars to get any real dmg.
Balanced is pure zoning as it has no OH outside of db4 or 4d4, which is pretty much the same thing as POS, but Balanced is more meter efficient able to do easy 38% dmg with 1 bar