If you have the buff space for it, may as well use it, since it's free damage. For all you know that could be the missing 1% dmg on boss that saved you from wiping! That being said, it would be the first buff of choice to be removed by me if i started overbuffing on w/m(but shouldnt be an issue unless you have every possible buffer in your group(including outside instance buffers too).
I see, ty
I just did a test this morning w/ my m/k using T-Storm @ lvl 57 & Intensification @ 97 ( 4465 mdmg ).
w/o: 132k dmg to tiles
with: 154k dmg to tiles
so there's about a 20k dmg increase, so about 16.7% dmg increase.
The effect from intensification seems to be magnified on lower level mobs. I did a test on mage on CoT - tstorms were hitting for 30k more (10% increase) with intensification. I then went to kashylan to hit the immortal harpy using electric bolt, and it was only hitting for 7k more on avg with intensification, which is only around 3.5% increase. It doesn't seem to scale well with increasing damage. Hitting the same harpies on W/M, with 1m hits the difference was not noticable at all.