evena wrote:
So . . . *bites her thumb at grep*
Yeah? Well, I bite my tenth finger right back at
you.

Personally, my last three casting characters leveled up to around Veteran through nothing other than exploration required to train each spell a little, the XP you gain from spamming them 'til they're mastered, and a little bit of Sylvan UPS quests with Narnia chains on the side. Sure, it may be boring, but any leveling is boring, and if you're concerned about levels... you'll probably want to master your spells at some point. It's extremely safe and forgiving for error and distractions, something I valued heavily when I was watching movies in the foreground whenever I was logged in and not running my chat script. I am giant.
Heck, any casting class could probably shave the hum-drum boring grind from the forced familiarity system of their class by spamming each rank's spells to mastery as they get them. There's at least opportunity for a level or two on most of them... and it isn't like you won't benefit from the mastery, the preserved familiarity bonus, nor the modest-but-consistent XP from doing it that way.
It only takes roughly 1k-3k casts to master a spell even if you only train it once and save your XP and money. You can count on, depending on whether or not it is a 'buff' spell, gaining at least a level for a rank's worth of mastery casting... provided you don't magically do it all in under an hour and get blocked by the time-based cap on casting xp. It is completely legal to do 'alias x cast 'blah' self' followed by 'x;!;!;!;!;!;!;!;!;!;!;sleep' and come back to SK ten minutes later, and it is also completely easy and safe if you place yourself well. It's one of the multiple ways to gain experience that are part of the gameplay, and it is worthwhile to at least make sure people are aware of this method. It's the best for how I played, and it might just be the best for how someone else does, too. I much preferred spamming heal on myself in a room in the middle of nowhere than spamming heal on some guy in some dungeon for a comparable amount of XP and more risk. I also preferred it to having to pay close attention to the game while using group-affecting damage spells, because the targeting mechanics in the game still have some room for improvement. At least, until I had mastered the spells I wanted to level with. Then the leveling could be done with a better familiarity run, more reliable casting, and without the disappointment of spending that xp on spells.
A tip for anyone who wants to try it: if you are in a group standing behind something, it will not start combat with you if you cast a harmful spell on it. If it is a pet, it usually remains charmed. There are pets which do not get harmed by your spells nor affected by your spells, saving you from having to heal or release them before the next cast... if that even makes a difference (I don't know if it does.)