1. 4 - 5 good phalanxes, I'm talking of hysteroi pezhetairoi or argyraspidai

2. 2 sphendonetai

3. hire 2 units of steppe riders

4. 2 - 4 thracian prodromoi do well

5. so do 2 thessalian cavalry

6. infantry with good armour, so no agrianians

I managed to totally annihilate "my" 7-province Getai-empire with that after one of my promising generals decided it would be fine to become a dirty barbarian.

The first stacks I met were really dangerous, many horse archers. It's important to take out the phylakes daoi and the other archers / slingers first. The stacks I faced towards the end of the 15-year war were crappy, basically Komatai hordes and celtic levies. The last Getian was executed in Veldideno in Raetia.