Give me advice on grinding german and russian tt

Germany:
Ground - 2A4 pzbtl 123 (probably buyin this)
Air - F/A 18C Swiss (bought)
Russia:
Ground - T-80UD and 2S38 (bought)
Air - Su-39 (cas, searching info)
Heli - KA-50 werewolf (if i buy su-39 i will buy this too)

Thats all i didnt mention about usa i grinded till 6.3 but stopped i decided continuing to usa will take my soul while grinding the other big two nations at the same time so at least after finishing one tech tree i ll start it again but here is the premiums that i bought already and thinking buy some of them just write yall im looking for wisdom and some advice from you veteran players who loves helping 40 level noobs out there thats all thank you for reading waiting for your response thunder out. <3

For the russian:
The t80ud has a t72 transmission so reversing is out of question. So turning whole tank will help a bit. Using

smokes are important for evading missiles and retreating.
learn tanks weak spots around that br.

If you buying su39 for cas you need to think about br difference between t80ud and the su39.

For the germany:

The f18c will face fox3 spam in a uptier
so i will suggest you to learn notching, evading and few modern combat moves before going against those.

Not sure what you want to be told here

If you need tips about the vehicles themselves:

It’s quite a decent MBT, don’t rely on its hull protection (and its turret protection in an uptier), other than that its a pretty solid and enjoyable tank.

First and foremost, if you’re buying the Pzbtl 123, DON’T USE IT WITH THIS PLANE ON THE SAME LINEUP. You’re going to get uptiered (facing tougher vehicles).

Other than that, the Hornet’s biggest strength relies on its AIM-7Ps and its high instant turn performance, you can point at everyone for going on either guns or radar against oponents on close range, watch some tutorials to set up your radar, I recommend this one from jaek.

Good lineup, the 2S38 biggest strength is how annoying the autocannon becomes, otherwise now it is mostly a glass cannon, and the T-80UD besides not having thermals, it’s quite the vehicle now.

Get the Su-25K, and if you want to grind the Russian air tech tree, get either the MiG-23 or the Su-30. If you go on the Su-39 (a 11.3) while having 10.3 vehicles, you’ll waste your ground vehicles potential.

I have no opinion on the Ka-50, but same as the Su-39, it’s 11.3 and your premium lineup is 10.3. You’re really going to uptier your lineup for CAS? I wouldn’t, but it ultimately is up to you.

Hope this little ramble helps.

Buy the BMPT-72 and grind russia. better than germany in many ways