Go watch YouTube guides, there are enough to find
You can train with attack, do teleports, or do High Alchemy - I believe those are the most popular methods. In any case, getting to level 99 is difficult, for ANY skill. For most skills, including magic, it will cost you lots of money. It will also cost you lots of time. Note that every 7 levels, the amount of experience points required doubles. So, if you are already at level 92, you are halfway through. If you are at level 71, you just have 1/8 of the experience points required for level 99 - so, assuming it took you a month of intensive training to get that far, it will take you a further 7 months to reach level 99.
To get 99 mage fast is to high lvl alch from lvl 55-99. i dont have 99 mage but i heard u need about 19k of nature runes. (if i am wrong correct me) and a fire or lava staff.
Your wizard will be transformed into a night paladin mage lvl. 99.
train your agility to 99.. lul
Use the tele to WC, go on a house with portals and speak with Dark Mage. He sell nail and all.
Yo go to wc on the emotes part, and you go to a little house with a mage. Enter the 2nd last portal in the right side :P
In KH2 lvl 99
At lvl 68 you can learn it from any Mage trainer
i think the highest lvl is lvl 99
do the new ageint quest
Upgrade lvl.99
you use range or use mage... depends what lvl you are
you keep training your skill to get up to lvl 99