My thought was to wire it in low wye 120/208 3 phase with the all the components of the L-2 leg isolated (not tied together). In a standard 12 lead this would be:
T5,T2,T8,T11 isolated
T4,T6,T10,T12 tied together for L0 neutral
T1,T7 tied together for one of the Line outputs, designate L1...