What should I be getting next?

[Soviet]

Honestly, it depends on which hero class you're going for.

What I did for my peltast

Khergit scale + wisby gauntlets -> CTS (was cheaper at the time) -> eastern heavy -> hero -> Rus Helm + Hourglass Gauntlets -> heavy plated -> Swadian Halberd
... Then i sold everything :)

If you're going Marauder you might want to get a Sarissa instead of CTS.