of course seleucıds carthage (maybe greeks and parthians )sınce beıng succesfull wıth them at VH VH requıres very tough battles at fırst 50 turns ( i claim that seleucids are hardest factionto play ı dıd not do anythıng and parthia egypt armenia pontus wage war to me ın startıng turns if one of them attacks the rest wıll follow i played wıth them several tımes just order of attackıng changed)