Online games take 1-2hours. Quickspeed. People have tier 2 units (mages, rangers, swordsmen, etc) around turn 100, and tier 3 units (archmages, druids, champions, etc) around turn 120. We generally attack each other around turn 120 (~1 hour into the game), with the more advanced person (people) making the walk to enemy land(s).
I suggest having a basic defense/weak attack by turn ~80 (30-45minutes into the game), and a strong defense/assault team by turn ~115 (~1 hour into the game).
Our games are pretty much always over within 2 hours.
For practice, I recommend these settings:
Quickspeed
Tiny (3-4 players), low sea level
Hub (ismuth 1 wide, pressed neutral, solid hubs, flat map, balanced resources)
Advanced start (default points [3 cities+?])
No_barbs
No-Tech Trading
Unrestricted Leaders
No Tribal Villages
Blessing
Compact enforced
No Lairs
No Unique Features
Note that we do not like fighting with warriors and axemen. If we wanted to do that, we could play BTS and have 8 people for a
"FFA Blazing Pangea!" in 5 minutes on gamespy server. That's why turn 80-90 is the earliest attacking done, with most (80% of the time) no attacking until ~turn 110. (Hub with 1-wide ismuths helps discourage mundane (early) unit rushing in general)
My hamachi network: FFH_Ecofarm, password: ffh