[BUILD VIDEO] How to Achieve 100% Damage Reduction in #Division2 / Memento-PFE-Drone Build

But what is the best way to trigger the Overcharge at will? This current build requires FOUR KILLS to proc Overcharge and then the invincibility lasts for 15 seconds. This makes it a random boost that occurs at a random time during combat. Useful, but not amazing.

Demonstration videos for this build can be found here:
https://youtu.be/6Yc4yIRWyDU
https://youtu.be/Q9usBcn1UDc

The only way I can think to trigger Overcharge at will is to sacrifice Blue Cores for Yellow Cores so that the base skill level for the Defender Drone is +6. That way, our characters hide in cover and trigger Overcharge by simply killing one red or purple. Then, we're invincible for 15 seconds. We can jump out of cover, and kill everything even in Legendary. So, being able to time the Overcharge would be amazing.

But sacrificing Blue Cores will definitely weaken the character for overall combat tanking.

Suggestions welcome from anyone?

Some things to note:
1) You don't need Memento or a Murakami piece to get 100% damage reduction from the Defender Drone. This is an OVERALL combat build. You DO need Memento in combination with a Murakami piece so the drone lasts longer than 30 seconds with a short cooldown. Without Memento and Murakami, the drone lasts only 20-ish seconds with a much longer cooldown. Combat uptime suffers very much.

2) To get 100% damage reduction from the Defender Drone you only need to get +3 (maybe more) base skill levels from SOMEWHERE, whatever equipment and skill combinations you can think of. Then, Future Perfect can boost the Defender Drone to Overcharge.