Well, I haven't yet met the player who is able to avoid every single trap. It's all mindgames.
Anyway, the 80-90% I'm talking about was a midfield trap usually started out with a JK onto a bomb. The hits were like this: JK, Bomb, HP, HK, Bomb, HP, HP, Air throw or JK. The JK had to be timed just right. Too early and the first bomb whiffs, too late and you can't throw the second bomb. I don't really use this combo any more because I'm almost always in a position to go into a HP, HK, Bomb infinite.
The 54%, 61%, and 71% combos are done off of corner traps, with Cyrax in the corner. The 54% is: Bomb,(walk under) HP, net, deep JK, HP, Air throw. The 61% is: RH, Bomb,(walk under) suJK, HP, Air throw. The 71% is: RH, Bomb,(walk under) suJK, RH, HK.
I just got an idea for another one, I'll post it if it works.
EDIT: IT WORKED! It's really complicated, so this might not make sense. Corner trap, Cyrax in the corner: (opponent in net over bomb) (Push them forward) Bomb,(throw second bomb), Uppercut, Bomb, HP, HP, JK, HK. 86%
EDIT 2: At first I didn't think it was possible, but I found out that if you stay as close as you can to the wall and walk forward in between the two HPs, you can then JK, LP, air throw for 92%. You can replace the LP with a HP for 93% instead on Jax, in case it wasn't difficult enough already.