so many ideas... this one came to me a few days ago!
and i know its 100% possible, and can be done if a day or 2.
how it works is, you have a probe (high shield lvl) and it is carrying a defence matrix!. and than theres a spawn up top.

ALSO, i have discovered how to stack wit triggers, so u will be able to have stacked buildings (much like in dodge defence)
this is an OYO map. (on ya own)