US - 3.0-5.0, 6.7, 11.3-11.7
Russia - 1.0-2.0, 3.3-5.3, 8.0-8.7, 10.0-10.3, 11.3-11.7
Germany - 3.3-5.7, 6.3-6.7, 8.0, 8.7-10.3, 11.7
US
3.0-5.0
Stabilized armoured Shermans for that BR make them a menace to play against. The downside is that they don’t have good pen until 5.0.
6.7
Extremely stacked lineup at 6.7 with really good armoured heavies with great penetration. The heavies are also decently mobile (except the T26E1-1) with great reaction times supported by great lights with HEAT.
11.3-11.7
Abundance of M1s all of which have fast reloads, great mobility, decent armour, and great penetration. Just an overall good tank and you get a lot of them at this BR range.
Russia
1.0-2.0
BT-5, BT-7, BT-7M menace, not much explanation needed. No Cons lol.
3.3-5.7
T-34s and KV-1s are extremely good in this BR range especially the ones with the 85mm cannon because it has a round that can magically go through even the most angled target. Cons - Depression.
8.0-8.7
One of the first tanks to get 2 plane stabilizers, LRF, and APFSDS give it a massive advantage. The Object 906 in particular is borderline OP because its a light with great mobility, APHE, stab, 4.3s reload, and surprisingly great survivability. Cons - Depression.
10.0-10.3
The most stacked lineup in ground. Just great MBTs, great lights, great SPAA. Really there’s no weakness in this lineup except the lack of depression but at this point you should be used to it.
11.3-11.7
Fast, armoured, and high pen tanks with great FCS. Easy to play, easy to do well in. Light tanks from 10.0 can be brought up here and do pretty well. Also has one of the best SPAAs in the game to cover you from CAS. Cons - depression :(
Not gonna do Germany. They’re just generally good. Their main weakness for their WW2 tanks is the lack of mobility and reaction time.