normally it should give you about 6dB attenuation from 5 down to 12 (clock), the rest happens below 12. So I normally mix the signal in by turning up to about 10 and then have about 210° rotation angle to mix very very smoothly.
On a log taper rotary fader the first 120° or more are more or less useless because of the low dynamics in most electronic music. Fine mixing happens mostly in the range of 30-60° rotation angle of the pot. With linear taper I can use much more.
BUT it could be another thing on mixers without input gain and sources with very different level. Never tried this you yet...