I've used the dowsing rod to get two deep arrowhead deposits so far. The speed of mashing needed to get them was so intense that it hurt, and it took me over a minute of attempting to finally get the bar filled to the top in both cases. I used first person to get my position right very precisely, so this painful mashing is from the optimal position. I tried looking for solutions to this problem, but all I could find was for finding the right position, not achieving the right mashing speed.
There have been games I was unable to complete because of mandatory mashing checks I couldn't complete. Should I just make a macro that spams whatever key corresponds to the Y button at 10 Hertz or so and