im planning on doing power mining with the spirit kyatt and duelling rings but i need to mine around 15.3k iron ore. Since i have never used this method how long would it take to mine that much iron ore using this method? Also what do you suggest i wear?I was thinking weight reducing gear?

The last time I did it, I was getting around 800-1k iron ore per hour, so probably 15-19 hours? You don't have to worry about your weight, since your idle long enough to regain it while mining the iron.

73 (992895 xp) - 65 (449428 xp) = 543467 exp left.

 

On average, I get 35k exp/hour powermining iron. So, the number of hours would be:

 

543467 / 35000 = about 15 1/2 hours of powermining.

 

Good luck. :D