The only expensive part of the Thor Shot is getting the platform(s) into orbit in the first place... after that’s overcome, they’re pretty inexpensive. Plus, once the platform(s) are in place, you can easily supplement the “tungsten telephone poles” with a few score “tungsten crowbars.”
An object impacting at 7 km/sec delivers kinetic energy equal to its approximately half its mass in TNT; So a cubic meter of “tungsten crowbar” would be (doing some rough “back of a napkin” math) roughly equivalent to ten-ish tons of TNT.
It’s possible to do the orbital mathematics, using no tools more advanced than a slide rule and a chalk board, to plot an targeting solution for these rods from god that is accurate to within a few meters. With the processing power available to Sixth World computers, you could probably get it down to sub MOA accuracy.
They do have troubles with moving targets if you cannot predict accurately where the target will be in ten-twelve minutes after you “pull the trigger,” you’re going to have problems. But, if you know where the target will be or you send more than one, this becomes less of a problem.