Ok, I'm not too sure if this is posted but i couldn't find it so what the hell.
This trick will teach you how to raise your spell damage on private servers as much as you like (Resets on a DC) + Works on scape ^_^
What you will need:
1 spell caster (Which your bugging)
1 priest
On 2 different accounts
The priest needs the talent Divine spirit in the discipline tree, and 2/2 improved divine spirit.
How to do it:
Have the priest and spell caster join a group together (I make it a raid group, makes it easier) and meet up, anywhere, doesn't matter at all (Preferably somewhere private
Have the priest cast Divine spirit on the spell caster, and then logout strait after.
Once the priest has sat the 20 seconds and has fully logged out, the spell caster must remove the Divine spirit buff WHILE the priest is offline. if done correctly, the mage will lose the buff but keep the spell power.
Have the priest log back in, cast Divine spirit, and repeat.
Can be done as much as you like, iv got up to 30k frost bolts. Havn't tried it to solo bosses yet but I'm sure it can be done with patience.
I'm also sure more can be done with this bug if its explored a bit, maybe different classes/skills.
Just reply with anything you find!
Sorry if this is a repost!
(I also posted this on Deathsoft)