Edited by Lightspeedflashb14_ESO on October 22, 2018 2:58AM
The end damage of 300% is additive with champion points, this leads to the following-
First i took all my percent amps off, including my champion points and vicious ophidian. this resulted in this tooltip-
and then i did a quick parse and got these numbers-
base hit was 656 and the final hit was 2625 and 2625/656 is 4.00 this is the correct way the game ought to scale the skill, as was recently pointed out to me by @glavius
I then put 13% into mighty and got this tooltip-
and then I parsed again.
this is where things got a little tricky, base damage went up and so did the final hit but as you can see, base is 741 and the final blow is 2709 and 2709/741 is 3.65, not 4, like with no other percent amps. but 2709/656 is 4.129. so the game is taking the 300% and adding it to the 13% from mighty, multiplying by the base and then adding the base damage back in, like this (656*313%)+656. this seem to not be the way that would be intended.
another parse, i added 20% into thaumaturge.
again, the base damage and the tooltip went up, by the correct amount, 872 in the parse. But the final blow is 2841 and 2841/872 is 3.25, Again not 4. But 2841/656 is 4.33. and it is additive on the last hit. I believe that the calculation looks like this, (656*333%)+656. The calculation ought to look like this, in my opinion, (872*300%)+872, taking the tool tip number and simply multiplying the 300% and then adding it back in. this would bring the damage up to 3488. Without the math working like this, the skill is around 10% weaker then it seems it ought to be, at my champion points and would only get weaker the more you add percent amps to it. This is very counterintuitive.