NieR:Automata - Farming Location for Offensive Heal Chips

Spawn at Forest Castle: Front, run across the bridge towards the group of three machines, and destroy them. They don't always drop Offensive Heal chips, but they do it enough to make it worthwhile. After destroying the machines, run back across the bridge until you see "Saving Possible" at the top right of the screen. Quick Save the game and load the current save. This will respawn you back where you started so you can rinse and repeat. As always with farming, make sure to carry Drop Rate Up chips.