what to do.. i jhave a little over 1.5m

Crafting nature runes using them in the Mage Training Arena Alching Area? I've heard it's one of the best mage xp.

You can go to barrows with slayer dart, good xp and loot, or go to steel dragons with chaos gauntlets + fire bolt, can hit 15s fast and I have gotten 2 d skirts doing that

i agree with all of the above 100%. enchanting in training arena, barrows (fun, can make money if you have better luck than i do), killing metal drags with fire bolt and chaos guantlets are all awesome. the last technique is alching. yes yes, everybody alchs to get mage lvls, but it makes money or will make you break even most of the time. enchanting is more exp per hour thought. good luck