let me explain for some reason ppl dont no this...
killing the spiders in lumby basement u get mage exp while afk without having to bot
so u imagine that u go to sleep
and set it up u get like 50k exp before u get auto logged
i no this from exp but i use the fire wizard so i can get the extra exp
cost of mind rune - 9 gp
exp for splashing air strike - 5.5 exp
13m exp to 99
13 * 9 / 5.5 = 21.2727 gp to 99 from lvl 1
u think thats expensive but its very easy and decent exp
u wear the armor so u splash and avoid killing the spider