Eternal War - Chaos Marines Vs. Imperial Fists - DoW: Unification

Ready for Eternal War!
I open with Chaos Marines and quickly get them Heavy Bolters. I manage to contain the Imperial Fists and claim most of the map, however IF are good at turtling. There's a lot of back and forth reaching into the late game, including Terminators and Obliterators Fighting Centurions and two land raiders fighting eachother, however I am eventually defeated,
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Dawn of War: Soulstorm with Unification Mod V.6.9.25
Black Legion Chaos Space Marine Warband Vs. Imperial Fists Space Marine Chapter
Grand Regent's Park Map - Insane Difficulty