The original plan was to have DS transport elements for battalions but that got put on hold perhaps for a later expansion. You can recreate them as follows:
Battlemech Battalion Transport = Overlord + Mule
Aerospace Wing Transport = 3 Leopard CVs + Buccaneer
Armor/Artillery Battalion Transport = Triumph + Mule
Infantry Battalion Transport = 3 Furies + Buccaneer
By linking the dropship requirements to battalions will this not mean large numbers of elements formed into DS Units/CTs and CUs? This is even more so if small capacity DS are used such as the Leopard. With about 30+ battalions to Combat team the number of DS could grow well beyond one or two "transport" DS wings. I also wonder how one would organise these tailored DS elements into squadrons of 4 DS or a wing of 12 to fit the scale of ACS or scaled SBF for aerospace combat.
To be clear, my focus is more Scaled SBF and ACS for ISW so I have not looked smaller scale scenarios/campaigns.
I sat down with the JS/DS book from the 'before times' and came up with the following DS sqns designed to lift CCs as efficiently as possible. Note that there is some excess "space" in each transport group (or a very small deficit for a few squads or handful of vehicles). Capacity number were divided by ten and then rounded normally - ie 112 Infantry = IT11; 135 infantry = IT14.
Take for example Capellan Confederation: lift required - AT36, IT270, MT108, VT666
Sqn 1 - Vengeance (AT36), Overlord (AT6, MT36), Overlord (AT6, MT36), Overlord (AT6, MT36)
Sqn 2 - Condor (IT34, V20), Condor (IT34, V20), Triumph (IT14, V53), Triumph (IT14, V53)
Sqn 3 - Condor (IT34, V20), Condor (IT34, V20), Triumph (IT14, V53), Triumph (IT14, V53)
Sqn 4 - Condor (IT34, V20), Condor (IT34, V20), Triumph (IT14, V53), Triumph (IT14, V53)
Sqn 5 - Seeker (IT12, VT64), Seeker (IT12, VT64), Seeker (IT12, VT64), Seeker (IT12, VT64),
The above group has AT18, IT66 and VT 28 surplus capacity and can carry 27,610 tons of supply for the roughly 10 regimental equivalents (30 battalions). It carries everything in 20 DS (5 sqdns of 4DS)
I'm not sure how such a group would be constructed. Perhaps the actual Units would be "abstracted" and the transport squadrons and wings would look much like the Aslt AS Wings. This way DS assets could be assigned to purchased CCs depending on size and requirements. Or perhaps one purchases a complete transport wing as part of a CC much like the new Aslt AS Wings, the wings having certain fixed lift capacity regardless of the size of the actual combat team.
Here are the other attempts based on the House CCs -
Draconis Combine: lift required - AT54, IT270, MT108, VT630
Carried by: 1 Vengeance, 3 Overlord, 6 Condor, 8 Triumph, 1 Seeker, 1 Gazelle for 20 DS carrying 31,030 tons of supply
Federated Suns: lift required - AT36, IT270, MT108, VT630
Carried by: 1 Vengeance, 3 Overlord, 6 Condor, 8 Triumph, 1 Seeker, 1 Gazelle for 20 DS carrying 31,030 tons of supply
Free Worlds League: lift required - AT26, IT432, MT108, VT792
Carried by: 1 Vengeance, 3 Overlord, 8 Condor, 8 Triumph, 4 Seeker for 24 DS carrying 34,930 tons of supply.
Lyran Commonwealth: lift required - AT36, IT378, MT108, VT918
Carried by: 1 Vengeance, 3 Overlord, 9 Condor, 8 Triumph, 3 Seeker for 24 DS carrying 33,980 tons of supply.
I'm very interested in seeing what route the rules take as the lack of transport DS does leave something of a hole in the Advance Aerospace/Capital Aerospace rules.
Cheers.