My own 2 naira on what else is clogging the frequencies & what we could suggest pilots do:
1. Anticipate what information ATC will need before you request climb/descent which will be your distance LAG and ACTUAL passing level.
2. Asking for your rate of climb to restrict the next following aircraft on a departure, or with control, even though the aircraft preceding is the same type and left 5 minutes ahead of you (35 miles ahead by my calculation) - the ATC dont use the information they request which is aircraft type - why?
3. Use radials for climb or descent through levels - tell aircraft A turn 5 degrees left, and aircraft B turn 5 degrees left, and then presto, room to climb or descend...
4. Why not then clear aircraft going to the same destination to the same level - meaning we won't be affecting anyone elses descent... 7-8 mins separation of 50 miles is plenty, and is about average by time the clearance of "runway heading to 35, 50, or 60 then turn right LAG" is followed...
5. When you say you're 76 miles LAG and they say call at 70 miles -
completely pointless when thats less than 1 minute on a jet... clogging the frequency again.
Where and when does one meet with LAG ATC??