I feel happy with my loadout vs bugs. Spray and pray is easy to understand. Run and gun. I'm not as confident with bots.
Loadout: Armor is medium with crouch aim bonus. Base gun, the Adjudicator (assault rifle) from Democratic Demolition because of its armor pen. 2ndary is Autocannon and ammo backpack. Strategems are orbital laser, eagle airstrike, and mortar sentry.
All the advice I read is "go slower, avoid patrols, etc." and I'm fine with that but everyone I play with does the opposite. They engage EVERYTHING. I feel like I've got OK damage per shot, but everyone is getting there faster and killing things faster because they got there earlier. So I end up feeling like I'm not pulling my weight.
Headshots are OP against bots.
I tend to prefer the liberator, I set it to burst or even single fire, calmly ADS, and then one shot all normal bots, one by one.
You can take down the piloted walkers in one shot, too, if you can hit the guy riding it.
Bigger bots I tend to spam bullets at a bit more, but for them too, headshots are extremely effective.