A few things:
Spoiler :
- HA rush date is very map-dependant but I'd say that attacking around T80 with 10+ HAs is looks very doable on this one. But I think HA rush is a baad idea here, not because it wouldn't work (it's Emperor, everything works), but because it wouldn't really help you master the game mechanics
- That gold spot has no food and is ridiculously far away, no reason to settle it. Ever.
- Basically, barbs will enter your borders when the number of non-barbarian cities in the world exceeds 3 times the number of players (it's actually a bit more complicated but that's all you really need to know). Barbs will always enter your borders if they can attack one of your units on this turn, though. Anyway you should be safe for a while here.
- Mids good. Oracle not good. You don't have marble, aren't IND and don't have a lot of commerce and have plenty of land. So Oracle comes (if ever) after your worker techs.