Ray,
In the J^3(O) there are the three O's, one is a vector E_8, the vector being A, and the other two are spinor valued, and form conjugate pairs (ω, ω-bar). So the J^3(O) defines superfields
Φ = A θ-bar φ θφ-bar.
There are 24 dimensional, and construct the Mathieu group or Leech lattice Λ_{24}. Now the 3x3 matrix has diagonal entries which are scalars z_1, z_2, z_3 and the off diagonal terms are the octonions O_1, O_2, O_3, for the vector and the two spinor valued E_8's. With the diagonal entries we have that for a light cone condition that one element is constrained by the others. This reduces the number of degrees of freedom by one, reducing this to 26 dimensions, and there is the resulting Chern-Simons Lagrangian z_i∂_jz_k = L_{cs}. The action of a coboundary operator on this results in a full lagrangian, and the field density is ρ = v*(∂_iv)x(∂_jv) which is a topological soliton for v the vector formed from the scalars. There is a dual description on the octonion level, and the topological soliton is the string.
Supersymmetry breaks at the end of renormalization group flow, starting somewhere in the 10^3-10 TeV range in energy. So the end or RG flow is where the large SUSY pair masses emerge at Higgs breaking.
I have to confess I am not that familiar with F-theory, only a bit. The extension of this to an added dimension means the scalars are two component objects z_i - -> (z_i, σ), for the same component direction σ with all scalars. I am not sure what this means right away. This might somehow connect up with Tom ideas, but right now I am not quite sure how.
Cheers LC