My technique for getting the most flying as possible is when bidding to build a reserve line that has groups of 4 days at a time. Usually you'll end up with your 3 hard day group, 4 hard day group, 2 soft days together, 2 soft days apart, while working 4 day groups and usually a 2 day group. Then bid to fly A3 or A4. Usually I'll get 60 hours during the monthly rundown.