I'm not entirely sure if this is what you were looking for, but this rework felt good in testing.
Made general buffs to mission support.
Wave 1: Buffed support pyros to hard AI with disabled airblast and lowered MaxActive and increased WaitBetweenSpawns. Changed Big Heals to Quick Ubers on the first subwave. Changed Full Duration Ubers to Big Heals on final subwave, but changed the Giant Flare Spammers to use Flare Gun instead of Detonator.
Wave 2: Changed Giant GRU Heavies to Giant Persians and their medics to Kritzkriegs.
Wave 3: Changed Heavy Shotguns to Shotgun Heavies and limited their spawns. Gave Giant Sandman Scouts AlwaysCrit. Buffed common Scouts to Hard AI, but limited their spawns. Lowered Burst Demo spawns. Increased MaxActive of Engineer support.
Wave 4: Changed Quick Ubers into a Giant Medic. Gave Buff Banner for Giant Rapid Fire Soldiers. Adjusted Dragons Fury spawns and increased their MaxVisionRange.
Wave 5: Changed Heavies to Hard AI but limited their spawns. Changed Rapid Fire Soldiers to Expert AI but slowed their spawns. Snipped 1 set of Giant Dragons Fury Pyros.
Made general buffs to mission support.
Wave 1: Buffed support pyros to hard AI with disabled airblast and lowered MaxActive and increased WaitBetweenSpawns. Changed Big Heals to Quick Ubers on the first subwave. Changed Full Duration Ubers to Big Heals on final subwave, but changed the Giant Flare Spammers to use Flare Gun instead of Detonator.
Wave 2: Changed Giant GRU Heavies to Giant Persians and their medics to Kritzkriegs.
Wave 3: Changed Heavy Shotguns to Shotgun Heavies and limited their spawns. Gave Giant Sandman Scouts AlwaysCrit. Buffed common Scouts to Hard AI, but limited their spawns. Lowered Burst Demo spawns. Increased MaxActive of Engineer support.
Wave 4: Changed Quick Ubers into a Giant Medic. Gave Buff Banner for Giant Rapid Fire Soldiers. Adjusted Dragons Fury spawns and increased their MaxVisionRange.
Wave 5: Changed Heavies to Hard AI but limited their spawns. Changed Rapid Fire Soldiers to Expert AI but slowed their spawns. Snipped 1 set of Giant Dragons Fury Pyros.
Nuh uh