I'm wondering if there is any intention to create seconfary functions to the upgrade towers like shell/veil.
A radius is shown where ever you click an upgrade tower as Alien Comm. And my suggestion is that the radius can be extended of amplified.
In the case of Shade/ placing veil within the radius extends the range of cloak. This is effective to say a maximum of +2 in any one direction and +3 overall, per SHADE. This means that Alien Comm can create a chain and use several SHADE at once as long as thhere are veil connecting to each SHADE.
For the Crag there is healing amplification. Shellz placed in range of Crag increase its healing output and energy regeneration. 1 shell to 1 crag increases output by 33% 2 shellz to 1 crag increases op by 50% 1 shell to 2 crags inc. op. of 25% to each crag.