  The faithful distribution of entanglement in continuous variable systems is
essential to many quantum information protocols. As such, entanglement
distillation and enhancement schemes are a cornerstone of many applications.
The photon subtraction scheme offers enhancement with a relatively simple setup
and has been studied in various scenarios. Motivated by recent advances in
integrated optics, particularly the ability to build stable multimode
interferometers with squeezed input states, a multimodal extension to the
enhancement via photon subtraction protocol is studied. States generated with
multiple squeezed input states, rather than a single input source, are shown to
be more sensitive to the enhancement protocol, leading to increased
entanglement at the output. Numerical results show the gain in entanglement is
not monotonic with the number of modes or the degree of squeezing in the
additional modes. Consequently, the advantage due to having multiple squeezed
inputs states can be maximized when the number of modes is still relatively
small (e.g., $4$). The requirement for additional squeezing is within the
current realm of implementation, making this scheme achievable with present
technologies.
