have you read that report? No amount of using growlers as band-aid is going to overcome the problems reported there.
I'm pretty skeptical of this model of a paper eastern block airplane against a real western one.
If China were to really throw everything they had against Taiwan they'd probably win an island covered with smoking rubble, but the kill ratio wouldn't be anything like what is guessed here.
In any case, my point is that whatever LO airplane you have it really needs electronic warfare support to be effective. It doesn't need a lot, but even a little goes a long way.
All this stuff about 'radar cross section of a fly' is nonsense in the real world. 'Low Observable' does not equal 'No Observable'.