Howdy,
Never posted an exploit before, but this 4.0.1 patch seems really buggy, oh well.
Included below is something I worked out as a holy priest.
If you spam Holy Nova and have Althor's Abacus you get a HoT on you called Echo of Light.
If you keep spamming Holy Nova this doesn't drop off and exponentially increases over time.. 1-2 minutes... long as you have enough mana it keeps going up.
Included screenshots below (Sorry for how big they are, wasn't exactly sure how to post them smaller..)
Healing 986393728 every sec.. you can even see this in the combat log when you do it.
Healing for Goldcap? :P
Have fun all