I like to sear my steaks in a cast iron skillet. I use an induction cooktop and tend to start at medium-high and ramp up to as hot as the stove will get. I think the ramp-up is important to render some of the fat without just letting it all evaporate.
I turn the steaks over frequently (30s intervals), which keeps the inside from cooking too much while the outside gets nice and crispy. I take them off the heat probably 2-3 minutes (but keep flipping! The pan is still really damn hot) before they go into the oven (at 400F).
I take the steaks out when they hit 120 and pull them out of the pan ASAP.
During the “rest” that follows I add pepper and butter to the tops of the steaks. The outsides of these steaks become way, way hotter than the insides. But the size of the layer that is so hot is very thin due to the frequent turning. So they don’t need to rest long, and the temp doesn’t rise too much once they’re out of the oven.