I also have Venus, Mars, and Pluto in Libra in my natal chart. Usually when transiting Venus or Mars aspect these planets, I don't even notice. The inner planets move so quickly that their influence is not usually very significant. Transiting Pluto in Capricorn would be far more important when it squares your Libra planets. Also Saturn is soon to enter Capricorn. Saturn and Pluto will conjunct around 22 Capricorn in 2020 if I am not mistaken. If any of your Libra planets are around 22 then get ready for a major storm.