Idea is about make T2 arty possibility to be upgraded, similar like cybran shield and on master plane with fraction diversity.
Why? Becase now is T2 arty build only by noobs, or only as offensive building, never as defensive. It totally dont get that mass cost back.
TOTAL
Spoiler: show
EASY
PLANE:
T2 arty can cost half mass/energy and 2/3 build time
T2 arty had half dmg and lower range 128->85
T2 arty had possibility to be upgrade for number like its today. (half mass/energy cost and 1/3 build time)
tadaaaa.

MASTER
PLANE:
same as total easy unmaster plane but + fraction diversity on second upgrade, and posibility of 3th upgrade on same fraction. (uef, nomads)
- diversity-
Aeon
upgraded get bigger range 128->140
Cybran
upgraded get stun on shot (only units)
Serafin
upgrade get small bubble shield around (size 5, 1150hp -35e) but -500hp
UEF
upgraded same as today but posibility to 3th upgrade (for half cost again) -> range 128-135, splash 3->4, dmg 2000->2500, hp 3600->4500
Nomads
upgrade same as today but possibility to 3th upgrade (for half cost again) -> firing randomness 1 -> 0,75, reload time 11,1s ->7,6sec, hp 3100->3500