Expeditions Rome is stuttering during massive battles on my VastArmor RX 9070 XT. How to fix this?

This game engine is basically a museum piece, and seeing it struggle with a beast like the 9070 XT is just laughable. The new architecture was hitting a 2.1-3.5ms scheduling delay with the old DirectX calls, causing frame times to bounce wildly between 10ms and 50ms. I tried enabling every 'acceleration' toggle in the driver, but it just made the micro-stutters worse—total placebo. I eventually nuked all the redundant driver overlays and locked the core clock at 2600MHz. In RivaTuner, that jagged saw-tooth line instantly flattened into a smooth path, and the hitching stopped. I noticed VRAM temps climbed by 5℃ after the lock, so I had to bump the fan speed by 10% to keep things balanced. GPU temps are now stable at 62-68℃. I exported the scheduling logs to verify, and the fans are holding steady between 1400-1600 RPM. It's a bit of a struggle to get old games to behave on new gear.