Take route 2 via Shimoga, u can stop at Jog Falls too, the roads are the best amongst three options listed. We usually manage 8 hours and a max of 10 hours depends on stops. route 2 is the best.
There is another route via Belgaum, man thats the best
if you wanna offroad (due to the size of pot holes on the Londa Road), dont even think of this route