Generally speaking, LPS corals don’t need dosing to thrive. Regular water changes with a premium salt mix are enough to keep up with their element needs. It may be possible that some heavy LPS tanks could benefit from dosing, though.
If you think that you might fall into this category, you should begin testing calcium, alkalinity, and magnesium regularly to ensure they are maintained in the proper range. If you see an issue, you can then consider dosing to keep elements in check.