ok my 1st suggestion ever, i hope you'll like it Options

[DeE]

1st something like good old MAAS, but more new WEA styled.
an airship which won't be a super deadly killing weapon, but something like support station ... "guardian angel above your troops" healing them, helping them target distant enemies, transporting them, protecting, shielding and even recovering (ok i think it's too much)
it will have a defensive capabilities but won't survive for too long without help.

2nd another aerial something.
A counterpart to an airship something like gunship circling area and bombarding. It will come with some AA drones and something like stratofighter upgrade allowing it to go up and "off the screen" and then descend on the location you select (will need to refuel and rearm) or not it's up to you but i thing it will be too much without rearming and refueling.

i'm sorry for my english

P.S. if you like my ideas i can think about more things just let me know.

[DeE]

OK i've thinked this one off but i think you already have something similar ... i'll just try

1- Apollo M.S.C. (Mobile Solar Cannon) well a direct fire artillery that shoots a rays of sun

2- Cytadel designed for most turtling faction, basically a super-bunker that can survive a direct SW hit it comes with it's own defenses. will be expensive, big (and possibly limited to 1)

3- Sibirsk tank destroyer. tank destroyer with rotary cannon turret. the cannon itself is basically a railgun that shoots a hypercharged tungsten-uranium rods at super high speed (70% of speed of light) projectile will easily penetrate tanks and other armored vehicles. can have other weapon systems but mainly AT oriented.