Invaders - 50k per Uber? HOW

Everyone knows now how to hit invaders, but for all that accidently don‘t: Hit ONE Invader until your your maximum attacking bonus is reached, then you can use enhanced attack.
The right set for invaders:

And on hero skills:

If you do not buy hero energy, you might want to upgrade increased hero energy instead of sustained attack, as you will not use full sustained attack anyway.

But this is not all that is important, we also have knowledge to do, which does a huge difference too:

The last level of each (9 to 10) gives the most, so take care to max it.
In this setup i currently need around 50k energy per Uber Invader.