You can now get Quicksilver by doing these things:

KILLING DRONES
- 5% Chance to get 5 Quicksilver by killing drones
- 10% Chance to get 5 Quicksilver by killing Quads
- 20% Chance to get 10 Quicksilver by killing Walkers

NEXUS MISSIONS
- 25% Chance for Mega-Nexus Missions to give you 250 Quicksilver as Reward
- 20% Chance for Normal-Nexus Missions to give you 125 Quicksilver as Reward

DERELICT FREIGHTERS
- You can find Quicksilver in Derelict Freighters again (same Chance als in Halloween Update)