I wouldn’t worry too much about your turrets i’d worry more that your SC is so far away from your HQ. A heavy medic combo starting in the North corner will have all your loot and HQ before your SC ever triggers.
SC needs to be under shields rather than HQ. Your HQ will never be taken out by air strikes but your SC will if left in the open.
Empire Lvl 10 70k+ medals
Empire Lvl 8 14k+ medals
Leader - UncleOwen'sFate (perk level 48)