| Skill Advancement |
| • Rank 1: Drone's Armor increased by 35%. |
| • Rank 2: Drone's Armor increased by 70%. |
| • Rank 3: Drone's Armor increased by 105%. |
| • Rank 4: Drone's Armor increased by 140%. |
| • Rank 5: Drone's Armor increased by 175%. |
| • Rank 6: Drone's Armor increased by 210%. |
| • Rank 7: Drone's Armor increased by 245%. |
| • Rank 8: Drone's Armor increased by 280%. |
| • Rank 9: Drone's Armor increased by 315%. |
| • Rank 10: Drone's Armor increased by 350%. |
The superior craftmanship of the Drones created by the Engineer is evident in their clear lines and hardened armor.
