That would still leave AH-64 as the top dog anti-tank gunship, since everything better than Mi-24 VP is gone.
The Ka-50 did exist - it was first of all misidentified as an escort helicopter, and secondly no pictures emerged until about 1993. Also, it doesn't matter if we adopt a redacted timeline or not, the issue is whether certain units are appropriate or necessary for an RTS based around tactics and movement.
91 strict means in squadron service by 91. One squadron of planes or one battalion of a land vehicle in frontline service by New Years Eve 1991.
I am down with this too. Yugo loses Praćka, M-91A Vihor, L-19, Grom-B, M-96 Vidra, and Bumbar.
But it retains everything else.
Edit: I actually made a Yugo '91 strict deck. It is actually very competitive.
It loses a bunch more,the Vidra M-80A, Drug, M-91, Senke, Sava, Nora, Igman, and perhaps most importantly, tank ammo better than BM-15/17.
It's amazing how miserly the Soviets were with the good ammo. Perhaps that's because they didn't trust the Warsaw Pact enough and believed that "small" objects like tank rounds would end up in the west as soon as it was issued.