It is due to this line. The delivery robot only takes one item at a time which renders them extremely weak.

Yes, the problem is that requests are made one item at a time too. There is no way to specify a bigger request.

@hea3ven - The request system in general needs a rewrite, for multiple reasons:

1. I want a system of requesting that's independent of robots, for instance so Logistics Pipes or AE2 can cooperate with Builders better.
2. It's kinda eh.