Actually, that first part isn't a bad idea and it's Miracle Eye, not foresight. I don't think adjusting Dark/Ghost Type powers would make sense (or make a difference) in this environment. If you want to make Radomus harder, give Trick Room a much higher priority (add plus 8 to make it equivalent to quick attack) to make it go first or just make it permanent. Iron Balls could then be equipped to Radomus's Pokemon (if they're not already) making them always go first.