Software for mission planning

Hello until now I use a custom made drone with mission planner software, now we use phantom 4 pro.

1. what options did we have for mission planning like Pix4D to fly in a grid automatically?

2. Can we upload a polo line from google earth to those programs like Pix4D?

3. Which is the best program for mission planning?

Until now we have used Pix4D desktop for processing but now we will move in Bentley capture in order to combine photogrammetry aerial , terrestrial and laser scanner data.