Ok, here's the final shock heavy troops. This will be Sarissa and Macedonians, as Kom said, really heavy guys
The helmet is of Thracian type with Phrygian shape, very common in late Hellenistic era. Alexander's soldiers use it frequently.
http://filipeabranches.no.sapo.pt/MTW/Units/TC.jpg
http://filipeabranches.no.sapo.pt/MTW/Units/M2.jpg