no it doesn't work when you use it the DMG stay the same.because it was already calculated ( I think )
edit : you also have a very high chance of getting ban
so alot of player getting banned so here the way I used it for over a year : max DMG is 4 and defence is 3. Never use no CD, can use in rank but I recommend 3xDMG and 2 for defence or 0 if you want to be careful, you can use these in campaign at 100 on both but don't abuse it