Real realtime. 1h + 5m can be a drag
Make an actual realtime option where you need to struggle to meet the clock. 1h + 5m can be REAL slow at times and still both players end game with 1h left. 30m + 3m or something like that?
5min + 5min or just set the time any way you like. Same for the time period - no need for a 3 hr min time slot.