I think Jeong Jeong still surpasses Zuko and Azula, because he's very experienced and combined with his raw power. Zuko and Azula only have the raw power not the experience. If we could give them point of powers go to 100 I think it would be like this: Power is just the raw power, like that of the attackes. Experience is the experience they have in combat. Technique is how precise and skilled their attacks are. the number before the / is how much they have now and the number after the / is their potential. The total is for how much they have now.
post FBM Zuko. Power 80/90 experience 60 technique 80/90 total 220
Sane Azula Power 85/98 experience 60 technique 80/95 total 225
Iroh Power 90/90 experience 95 technique 95/95 total 280
Ozai Power 98/98 experience 88 technique 90/90 total 276
Jeong Jeong Power 85/85 experience 95 technique 95/95 total 275
CM Power 80/80 experience 75 technique 80/80 total 235
Zhao Power 65/70 experience 70 technique 45/55 total 170
Pre FBM Zuko power 73/80 experience 40 technique 60/70 total 173
Insane Azula Power 75/98 experience 60 technique 70/95 total 205
I think now we have a good look at how strong they are. You guys agree with this?