Um here's what I use I think theses work really well because as soon as you cast a spell it recharges while your effect is still on so its infinite.Its really cheap too and gives perma resist and def with the right CD-R and you can spam the maxed missiles it does most of the damage.Another question is wat does the ghost pet do cause I have it but I don't know what it does.im soon trading the book for the orb (the accessories part below resist)Consider this as ur last resort :)
Comment found on Dash Quest: Spell
I have recently beat him. With only weapon, it's nearly impossible to get over 5th stage the 2nd time. You need to be well prepared for it, especially with potions and some extra damage. Here is mine. At the 5th and 6th stage, cast spell whenever it's recovered, especially lightning. If you don't have lightning, you can use dancing sword ( can't remember its exact name LOL) with meteors. Further info is included. May the odds be in your favor :)
Comment found on Dash Quest: How to defeat the lich king