Which helicopters will perform well in certain USSR and USA ground presets?

Game Discussion Realistic Battle
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1

I would like to ask some questions about which helicopters will be suitable for certain USSR and USA ground presets.
I would appreciate if you can share your in-game experience with those helicopters and ground presets.

First, USSR has 4 helicopters at the BR of 9.7. However, all of them has some flaws: for example the maneuverability of Mi-24V/P is poor, and the optics of Mi-8 and Ka-29 are not that good. All of them fire 9M114 missiles which can fly 5 kilometers, and Mi-24 and Mi-8 can carry additional R-60M and 9M39 air to air missiles.
The 9.7 USSR ground preset is pretty powerful with helicopter and T-64B, along with BMD-4 and 9P157. However, is it worth taking those helicopters into the 10.3 USSR preset?
For 10.7 and 11.0 presets, both of them will have only one tech-tree MBT at the top battle ratings of the presets, which are T-90A and T-80B. I’m not sure if those presets will have good performance in battles, and whether I should put the Mi-35M and Mi-28N or Mi-8AMTSh-VN in the 2 presets.
After the battle rating has been decompressed, a new 12.0 USSR preset has appeared, with Ka-52 and Pantsir-S1 acting as its core. Will it be competitive in combat?

2

For USA, the battle rating decompression formed 2 major presets of 11.7 and 12.0. I wonder which one should I pick between AH-64D and AH-1Z for 12.0, and whether it is worth researching the AH-64A to replace the AH-64 prototype in 11.7 presets.