MOrbid: "I am playing company for Germans (very hard/very hard) now.
In the early beginning I was attacked by both Britons, Gauls and Dacs, then by Scythians and Fraks. For now I destroyed Dacs and almost elliminated Gauls and Britons.
And what was the most surprising thing (in bad meaning) - Romans did not attack Gauls during all this time and now they send fleet with large army to my new borders! So, I don't think that Germans have really good starting position. "
That is interesting. I have the completely opposite experience, once with germans on hard/very hard and once on very hard/very hard. The Scythians never even made a real appearance (apart from the obligatory VH criteria of declaring war on the player faction at the earliest point possible) until well after both Gauls and Britons were dealt with, and the Thracians (which is what you mean by "Fraks", I assume) did not declare war at all in the H (short)game and, while doing it when I reached their borders in VH, were too weak to do any real damage. The Romans declared war on the Gauls both times and did quite a lot of damage to them.
On the battle map the Germans' spearmen dominate so much it is almost silly. Just make sure their larger armies attack you (which they will invariably do, especially on H/VH), hopefully while you are in wooded territory, set up, and watch them desintigrate on the spearmen's phalanx. The TR mod help a lot on making the Germans less formidable barbarians by introducing the Lancemen and taking the Phalanx formation away from the Spearmen.