I like war machine for building the song jackpot -- the spinner rotations add to the song jackpot, as does the shot itself (it also adds to your score, not just the song jackpot). Plus it advances towards lighting tour mb on the right ramp. Also, it's an easy and safe cannon shot for v1.6 and up (pre 1.6 just let the cannon auto-fire up the right ramp).
Hells Bells,Whole lot of rosie, you shook me all night long, and each of the ramp songs (H2H,RNRT) are also good.
TNT is just a tool to cash in the big song jackpot without resetting it after the cash in, since it is the first jackpot completion during album multiball and the 3rd jackpot completion/orbit shot during tour multiball. So file it under lucrative for that reason.
Quoted from haiderdj:
Do you guys collect early song jackpots of a few million, or let them go to build and collect twice during multiball?
The latter.