I think it would be good if armories automatically constructed themselves over time. No other buildings -- only armories. The exact speed could vary -- not too fast, mind. Slow enough that having an engineer makes a big difference. But fast enough that a comm could drop one in response to their team requesting ammo/health. Basically, this would have several advantages: 1. It's "safe" from a balance standpoint, in that it seems unlikely to break anything -- armories are useful but not usually game-deciding on their own, so unlike other buildings self-constructing armories don't ruin anything. People could just e-build them anyway, but that often doesn't happen. This encourages comms to drop them in key locations even without an engineer around, knowing that they'll eventually construct themselves. And, of course, dropping an armory in an 'inaccessible' location and letting it autobuild is pointless, unlike other buildings. 2. It makes engineers less essential, without making them obsolete. Yes, engineers should be important, but right now you need them for everything and everything falls apart without them. I don't think it hurts to make them slightly less essential for supplies. 3. It encourages comms to build armories, and gives them something to do to help their team even when they don't have any attentive engineers around. Armories are cheap enough that even a comm who drops a lot of them probably isn't going to bankrupt their team or anything. 4. Unlike other 'comm power' suggestions, the other team can easily do something about this -- armories are as vulnerable as ever, especially when they're very slowly building themselves and start with low health. Basically, it's a relatively easy and lightweight substitute for comm powers that uses things that are already in the game. The only real disadvantage is that it makes engineers slightly less essential, and honestly, I'm not sure that that's a bad thing -- it's not like they're not still necessary for building every other kind of building.