Challenge about the Heavy Object, i tried it as Pacific Front on easy with Russian hard AI as comrade. I found two odd things
1) Friendly AI cease to build units past 2 hour mark (Yes, the battle took me 3 hours) so the last hour was just me fighting everyone on the map with barracuda spam and rocketeer blobs
Can AI... run out resources ? I dont recall that happening like ever in actual skirmish, but i might not see it since the time i siege their base, they usually have +100k resources in stocks if i get a spy in their eco support building, so the game doesn't last long enough for them to run dry.
It build some flak troopers, few tigers and engineers but no attack force, it had resources for repairs though, but if they can run out of resources, they had only one oil derrick and one miner who i had to protect with rocketeers.
I also kinda felt shitty that i capped all the oil derricks for myself except one i forgot.
So i was running the show while AI atleast was a good bait for those annoying offensive support powers.
By the time AI ceased to help me, i already demolished Last Bastion's base so the boidmachine was out of action.
2) Death blob
Once i smashed Bastions and US base, they sold their bases and moved all their units to a circle in their main fortress. I didnt noticed it until it was like 100-200 units strong blob and the framerate has gone to shit when they started to move.
I was like: " Game over man ! "
They have destroyed 2 bases along their way, one where one Bastion HQ stood (I used that one to make mass barracudas, which won the match for me) that had solid defences and alot of units. Then they demolished my foward outpost at the right, bottom where's a tech expansion. That had some units and defences too.
Then, the remaining units moved to our main base
Ramwagons, Archelons, Seitaads, Knightframes, Lancers, GI's, Siegfried. Destroyed half of my base and took 50% HP of my MCV before, their ignorance to base defences was their undoing.
I had no units since everyone died in the fight beforehand, but i was building Guardian GI's, Kappas and defences as much as i could since... 206 327 credits in reserve. So i did replenished and manned my base before i rebuild everything.
I won the map after that, i reclaimed the Bastion's base, build atleast 30 barracudas and then just tore the base apart. Since i blow up their nuclear reactors already, Epsilon's base was out of juice and only gattling tanks, archers and one grumble remained as a threat.
Ground combat was out of question since tech defences seems to be capable of firing even if power is out. So i just used Barracudas to bomb everything. Then enemies sold everything, unloaded every bunker and gathered everything, smashed through my forward base the second time (But this time i atleast saved some of my units by ordering them to retreat) and they raced to my main base but they failed as i had bolstered my defences and AI build alot of defences at the entrance as well
I cannot imagine this challenge on normal or hard jesus christ ! But i must say someone had to put alot of effort in this one .