I saw this in a dream (i see alot of OP2 stuff in dreams):
instead of not being able to stop the blight, they made an important discovery:
the Blight dies when it touches cesium! the cesium comes in contact with the membranes and such of the blight cells, and since they are full of water, and cesium doesnt like water, the cell explodes, and it has a domino effect. but it stops about 30 feet radius.
Where'd all this cesium come from, you ask?
well, while the blight was terraforming, the quakes opened up some faults on the planet, and it turns out that pockets of raw sodium and cesium came up thru the cracks. when the colonies discovered this, they quickly divised methods of mining these "reactive metals and ore" from cracks in the ground.
heres the reactive tech tree
Magma Refining + Rare ore Extraction + Vulcanology
Reactive Ore Applications(Adv,16sci)
=|Reactive Ore Smelter (3w, 2500C,200R)
=|Reactive Metal Storage (1w, 200C)
=Reactive Ore Purity
=Unstable Weapons Development
==Stellar Fusion Weaponry (Eden)
===|StarBlast (guard post, tiger only)
==Weak Nuclear Weaponry (Plymouth)
===|Nuclear Rockets (spaceport)
==High Energy Waves (both)
===|Gamma Wave Cannon (disables vehicle movement for ~50 Marks)
==Static Discharge Cannon (eden)
===|Storm Beacons (increases chances of storms happening at location)
==Seismic Insability Weapon (ply)
===|TerraQuake Generator (increases chances of quakes at location)
=Atomic Time Keeping (decreases production, training (including Workers), and research times everywhere)
=Blight Disspelling Research
==Blight Resistant Materials
===Blight-Proof Walls
==AntiBlight SuperBombs
===|ABSTRACT missle at starport (Anti Blight, Special Targeting Rocket, Active Cesium Trigger
=Fusion-Fission Power
==|Advanced Tokamak (1000P, 2400C, 1000R, 500RA
==Matter-Antimatter power
===|HyperMak (1750P, 2500C, 2000R, 1500 RA)
=Flash-Core Vehicles
==|allows Jaguar Production
==Cycle-Flash Core Vehicles
===|allows Cheetah Production
==Triple Weapon Vehicles
===|allows Lion Production
I still gotta wonder why all that cesium would be there.