Actually the real kong ming is really good

[semen blow snow]

Help liu bei from nothing to establish shu
China is very big must know the terrains really well. Where to set ambush etc
To lead army have to be expert in
天文
地理
兵法
Lead army through different terrains and four seasons
Have to eat extreme bitter
Make weapons and armor from scratch
Medical standard also not high 
No clean source of water
Plan logistics, fd supplies. The larger your army the more difficult
Really not easy. Last time no Google map or gps

Sg so small i cant even tell u Jurong got what there