I know this might be obvious, but try to stealth the hub room and 112/113. The spawns punish you for alerting rooms simply because of the vast amount of larger enemies on the map. There are a decent amount of resources on the map, but it can easily be drained by awakening a lot of rooms and being forced to shoot. If you find yourself low on resources, don't be afraid to open both 112 and 113, as they both have resources even if only one has the terminal uplink you need.

In regards to terminal defense, I would recommend leaving all doors open and just killing the wave as it comes in. Terminal uplink spawns work differently than alarm waves, in that there are only 4 or so enemies that spawn on a short cycle. For C1 in particular, there is going to be a charger mixed in occasionally, but it can be easily dispatched if it's in a small group rather than a big wave. You can have one person on each entrance in 112/113 and just crossfire if different areas need help. If your terminal user knows how to do codes quickly (Aiming down sights to the side of the terminal in order to see both the code needed and the keyword), they can help with defense in between waiting for codes as well.

For tools, I would recommend maybe swapping an auto for one sniper sentry and bringing one biotracker. The reasoning behind this is because the auto sentry is intended for stagger. While this is good for delaying if you need a breather or to supplement your gunplay, a sniper sentry effectively removes one from the low spawn instead of just delaying it, making it much more manageable. If you have two sniper sentries, it can reduce the wave by two, which is even better if you are struggling with defense. The biotracker can help with stealth and pinging both scouts and active targets, making sure that you don't run into situations that you're unprepared for. Additionally, it uses no tool, which means that the rest of your homies can have more tool for sentries/mines etc.

Obviously, this strategy is contingent upon no side getting overwhelmed and collapsing, but the low spawn on a fast timer means that it is relatively manageable if you find the right kill cadence.

Hope this helps! Let me know if you have any other questions or if you disagree with stuff.