Stacking allowed if two different power sources

[moritheil]

If you like doing math, you will have fun with this - because ultimately you'll be doing a lot of calculations to figure out the astronomical damage your meleers are now able to put out.

 

[Infiniti2000]

Meleers? That's nothing compared to the astronomical spell DCs from the multiple headbands of intellect and fox's cunning spells.