24mg is high, I started on that as I was on 40 roll-ups a day without filters. I quickly went down to 18mg and that suited me nicely on 50:50 mixes and even high VG. I did try12mg but it was no use so have gone back up to 18mg where I'll stay.
I'm not into tobacco flavours so I'll let the people that are advise you further, hope you find what you're after.