There is on-going discussion on lack of hunting places for mages. Demorc are vulnerable to primordial fire damage but primo wave doesn't work on them as effectively as damage from primordial weapons. With fixed primo-wave it'd make a decent option for mages.
On 400 mage with primordial wand I hit demorc about 3000-4000 (x2.0).
With primo wave I hit only 8x240 (x1.0).
One of them is bugged, I finger-cross for the latter.