Legion Harvesters can repair structures and mechanical units
10 Idal Conduits provide enough for 200 supply; Legion has the fastest supply ramp-up time
Constructing Guardian and Healing Obelisks can be more cost-effective than deploying them
Defense Tips
Use Healing Obelisks to sustain your defenses
Deploy Monoliths instead of Guardian Obelisks when possible
Summoning Obelisks can create useful distractions and buff nearby Monoliths