definitely either smithing or mining
The total exp is 13,034,431 experience for a 99 stat on RuneScape.
Spend time on a stat and train it for experience. Once you get enough, you can be 99.
Yes, for everything except Dungeoneering (level 120)
The Hardest Stat is mainly based off of opinion. Though the one that I think is hard is Summoning. This is because you must kill monsters and have them drop charms, later you combine the charm, a pouch, and some shards. It then turns to a monster pouch that can then be summoned. The problem is that monsters rarely drop charms and a huge supply of them is needed to reach level 99.
There is no such thing as a stat changer that you can download for Runescape. Anything claiming to be is malware.
It depends on how good you are and what skill you are interested in. A low level player may consider combat skills to be easier because it is more spread out. Overall, people do say that prayer is hard. Dungeoneering and Summoning have been voted hard as well. But no one can declare any stat as the hardest.
Farming,Slayer,Agility,and summoning EDIT. Summoning isn't supper hard but thanks. Runecrafting and Mining should be added to this list.
There isn't a stat changer in rs.
If i am correct the highest combat level is 138. The highest stat levels are 99, but dungeoneering is an exception with a max level of 120.
There is no tool that can be used to change your stats in Runescape.
Stat changers are against the Runescape rules.
WikiAnswers will not provide information to break the rules of Runescape.