My favorite 2-hit combo shot of all time is AVLE - ironman loop then one time shot into BW. Awesome feeling making that combo.
ACDC bell; this isn't the best shot in pinball UNTIL you have 2X/3X rolling and just as its about to expire you NAIL the bell. That sir, is why I have it on my list of greatest shots.
LoTR ring shot. Never gets old especially knocking the ball out during DTR.